DevFdc.cpp@ 65620

Last change on this file since 65620 was 64846, checked in by vboxsync, 8 years ago
Devices/Storage/DevFdc: Add missing pfnQueryDeviceLocation, fixes crash after recent changes in the medium driver
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 103.4 KB

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1	/* $Id: DevFdc.cpp 64846 2016-12-12 22:27:26Z vboxsync $ */
2	/** @file
3	* VBox storage devices - Floppy disk controller
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	* --------------------------------------------------------------------
17	*
18	* This code is based on:
19	*
20	* QEMU Floppy disk emulator (Intel 82078)
21	*
22	* Copyright (c) 2003 Jocelyn Mayer
23	*
24	* Permission is hereby granted, free of charge, to any person obtaining a copy
25	* of this software and associated documentation files (the "Software"), to deal
26	* in the Software without restriction, including without limitation the rights
27	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
28	* copies of the Software, and to permit persons to whom the Software is
29	* furnished to do so, subject to the following conditions:
30	*
31	* The above copyright notice and this permission notice shall be included in
32	* all copies or substantial portions of the Software.
33	*
34	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
35	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
36	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
37	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
38	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
39	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
40	* THE SOFTWARE.
41	*
42	*/
43
44
45	/*********************************************************************************************************************************
46	* Header Files *
47	*********************************************************************************************************************************/
48	#define LOG_GROUP LOG_GROUP_DEV_FDC
49	#include <VBox/vmm/pdmdev.h>
50	#include <VBox/vmm/pdmstorageifs.h>
51	#include <iprt/assert.h>
52	#include <iprt/string.h>
53	#include <iprt/uuid.h>
54
55	#include "VBoxDD.h"
56
57	#define FDC_SAVESTATE_CURRENT 2 /* The new and improved saved state. */
58	#define FDC_SAVESTATE_OLD 1 /* The original saved state. */
59
60	#define MAX_FD 2
61
62
63	/********************************************************/
64	/* debug Floppy devices */
65	/* #define DEBUG_FLOPPY */
66
67	#ifndef VBOX
68	#ifdef DEBUG_FLOPPY
69	#define FLOPPY_DPRINTF(fmt, args...) \
70	do { printf("FLOPPY: " fmt , ##args); } while (0)
71	#endif
72	#else /* !VBOX */
73	# ifdef LOG_ENABLED
74	# define FLOPPY_DPRINTF(...) Log(("floppy: " __VA_ARGS__))
75	# else
76	# define FLOPPY_DPRINTF(...) do { } while (0)
77	# endif
78	#endif /* !VBOX */
79
80	#ifndef VBOX
81	#define FLOPPY_ERROR(fmt, args...) \
82	do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
83	#else /* VBOX */
84	# define FLOPPY_ERROR RTLogPrintf
85	#endif /* VBOX */
86
87	#ifdef VBOX
88	typedef struct fdctrl_t fdctrl_t;
89	#endif /* VBOX */
90
91	/********************************************************/
92	/* Floppy drive emulation */
93
94	#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
95	#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
96
97	/* Will always be a fixed parameter for us */
98	#define FD_SECTOR_LEN 512
99	#define FD_SECTOR_SC 2 /* Sector size code */
100	#define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */
101
102	/* Floppy disk drive emulation */
103	typedef enum fdisk_type_t {
104	FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
105	FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
106	FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
107	FDRIVE_DISK_USER = 0x04, /* User defined geometry */
108	FDRIVE_DISK_NONE = 0x05 /* No disk */
109	} fdisk_type_t;
110
111	typedef enum fdrive_type_t {
112	FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
113	FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
114	FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
115	FDRIVE_DRV_NONE = 0x03 /* No drive connected */
116	#ifdef VBOX
117	, FDRIVE_DRV_FAKE_15_6 = 0x0e /* Fake 15.6 MB drive. */
118	, FDRIVE_DRV_FAKE_63_5 = 0x0f /* Fake 63.5 MB drive. */
119	#endif
120	} fdrive_type_t;
121
122	typedef uint8_t fdrive_flags_t;
123	#define FDISK_DBL_SIDES UINT8_C(0x01)
124
125	typedef enum fdrive_rate_t {
126	FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
127	FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
128	FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
129	FDRIVE_RATE_1M = 0x03 /* 1 Mbps */
130	} fdrive_rate_t;
131
132	/**
133	* The status for one drive.
134	*
135	* @implements PDMIBASE
136	* @implements PDMIMEDIAPORT
137	* @implements PDMIMOUNTNOTIFY
138	*/
139	typedef struct fdrive_t {
140	#ifndef VBOX
141	BlockDriverState *bs;
142	#else /* VBOX */
143	/** Pointer to the owning device instance. */
144	R3PTRTYPE(PPDMDEVINS) pDevIns;
145	/** Pointer to the attached driver's base interface. */
146	R3PTRTYPE(PPDMIBASE) pDrvBase;
147	/** Pointer to the attached driver's block interface. */
148	R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
149	/** Pointer to the attached driver's mount interface.
150	* This is NULL if the driver isn't a removable unit. */
151	R3PTRTYPE(PPDMIMOUNT) pDrvMount;
152	/** The base interface. */
153	PDMIBASE IBase;
154	/** The block port interface. */
155	PDMIMEDIAPORT IPort;
156	/** The mount notify interface. */
157	PDMIMOUNTNOTIFY IMountNotify;
158	/** The LUN #. */
159	RTUINT iLUN;
160	/** The LED for this LUN. */
161	PDMLED Led;
162	#endif
163	/* Drive status */
164	fdrive_type_t drive;
165	uint8_t perpendicular; /* 2.88 MB access mode */
166	uint8_t dsk_chg; /* Disk change line */
167	/* Position */
168	uint8_t head;
169	uint8_t track;
170	uint8_t sect;
171	uint8_t ltrk; /* Logical track */
172	/* Media */
173	fdrive_flags_t flags;
174	uint8_t last_sect; /* Nb sector per track */
175	uint8_t max_track; /* Nb of tracks */
176	uint16_t bps; /* Bytes per sector */
177	uint8_t ro; /* Is read-only */
178	uint8_t media_rate; /* Data rate of medium */
179	} fdrive_t;
180
181	#define NUM_SIDES(drv) (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
182
183	static void fd_init(fdrive_t *drv, bool fInit)
184	{
185	/* Drive */
186	#ifndef VBOX
187	drv->drive = FDRIVE_DRV_NONE;
188	#else /* VBOX */
189	if (fInit) {
190	/* Fixate the drive type at init time if possible. */
191	if (drv->pDrvMedia) {
192	PDMMEDIATYPE enmType = drv->pDrvMedia->pfnGetType(drv->pDrvMedia);
193	switch (enmType) {
194	case PDMMEDIATYPE_FLOPPY_360:
195	case PDMMEDIATYPE_FLOPPY_1_20:
196	drv->drive = FDRIVE_DRV_120;
197	break;
198	case PDMMEDIATYPE_FLOPPY_720:
199	case PDMMEDIATYPE_FLOPPY_1_44:
200	drv->drive = FDRIVE_DRV_144;
201	break;
202	default:
203	AssertFailed();
204	case PDMMEDIATYPE_FLOPPY_2_88:
205	drv->drive = FDRIVE_DRV_288;
206	break;
207	case PDMMEDIATYPE_FLOPPY_FAKE_15_6:
208	drv->drive = FDRIVE_DRV_FAKE_15_6;
209	break;
210	case PDMMEDIATYPE_FLOPPY_FAKE_63_5:
211	drv->drive = FDRIVE_DRV_FAKE_63_5;
212	break;
213	}
214	} else {
215	drv->drive = FDRIVE_DRV_NONE;
216	}
217	} /* else: The BIOS (and others) get the drive type via the CMOS, so
218	don't change it after the VM has been constructed. */
219	#endif /* VBOX */
220	drv->perpendicular = 0;
221	/* Disk */
222	drv->last_sect = 0;
223	drv->max_track = 0;
224	}
225
226	static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
227	uint8_t last_sect, uint8_t num_sides)
228	{
229	return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
230	}
231
232	/* Returns current position, in sectors, for given drive */
233	static int fd_sector(fdrive_t *drv)
234	{
235	return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
236	}
237
238	/* Seek to a new position:
239	* returns 0 if already on right track
240	* returns 1 if track changed
241	* returns 2 if track is invalid
242	* returns 3 if sector is invalid
243	* returns 4 if seek is disabled
244	* returns 5 if no media in drive
245	*/
246	static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
247	int enable_seek)
248	{
249	int sector;
250	int ret;
251
252	if (!drv->last_sect) {
253	FLOPPY_DPRINTF("no disk in drive (max=%d %d %02x %02x)\n",
254	1, (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
255	drv->max_track, drv->last_sect);
256	return 5;
257	}
258	if (track > drv->max_track \|\|
259	(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
260	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
261	head, track, sect, 1,
262	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
263	drv->max_track, drv->last_sect);
264	return 2;
265	}
266	if (sect > drv->last_sect \|\| sect < 1) {
267	FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
268	head, track, sect, 1,
269	(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
270	drv->max_track, drv->last_sect);
271	return 3;
272	}
273	sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
274	ret = 0;
275	if (sector != fd_sector(drv)) {
276	#if 0
277	if (!enable_seek) {
278	FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
279	head, track, sect, 1, drv->max_track, drv->last_sect);
280	return 4;
281	}
282	#else
283	RT_NOREF(enable_seek);
284	#endif
285	drv->head = head;
286	if (drv->track != track)
287	ret = 1;
288	drv->track = track;
289	drv->sect = sect;
290	}
291	drv->ltrk = drv->track;
292
293	return ret;
294	}
295
296	/* Set drive back to track 0 */
297	static void fd_recalibrate(fdrive_t *drv)
298	{
299	FLOPPY_DPRINTF("recalibrate\n");
300	drv->head = 0;
301	drv->track = 0;
302	drv->ltrk = 0;
303	drv->sect = 1;
304	}
305
306	/* Recognize floppy formats */
307	typedef struct fd_format_t {
308	fdrive_type_t drive;
309	fdisk_type_t disk;
310	uint8_t last_sect; /*< Number of sectors. /
311	uint8_t max_track; /*< Number of tracks. /
312	uint8_t max_head; /*< Max head number. /
313	fdrive_rate_t rate;
314	const char *str;
315	} fd_format_t;
316
317	/* Note: Low-density disks (160K/180K/320K/360K) use 250 Kbps data rate
318	* in 40-track drives, but 300 Kbps in high-capacity 80-track drives.
319	*/
320	static fd_format_t fd_formats[] = {
321	/* First entry is default format */
322	/* 1.44 MB 3"1/2 floppy disks */
323	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
324	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 3\"1/2", },
325	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
326	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
327	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
328	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
329	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
330	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
331	/* 2.88 MB 3"1/2 floppy disks */
332	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB 3\"1/2", },
333	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB 3\"1/2", },
334	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB 3\"1/2", },
335	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB 3\"1/2", },
336	{ FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB 3\"1/2", },
337	/* 720 kB 3"1/2 floppy disks */
338	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 3\"1/2", },
339	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB 3\"1/2", },
340	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB 3\"1/2", },
341	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB 3\"1/2", },
342	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
343	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
344	/* 1.2 MB 5"1/4 floppy disks */
345	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 5\"1/4", },
346	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 5\"1/4", }, /* CP Backup 5.25" HD */
347	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
348	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
349	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
350	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 5\"1/4", },
351	/* 720 kB 5"1/4 floppy disks */
352	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 5\"1/4", },
353	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, FDRIVE_RATE_250K, "880 kB 5\"1/4", },
354	/* 360 kB 5"1/4 floppy disks (newer 9-sector formats) */
355	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 5\"1/4", },
356	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 5\"1/4", },
357	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 5\"1/4", }, /* CP Backup 5.25" DD */
358	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, FDRIVE_RATE_300K, "410 kB 5\"1/4", },
359	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, FDRIVE_RATE_300K, "420 kB 5\"1/4", },
360	/* 320 kB 5"1/4 floppy disks (old 8-sector formats) */
361	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 5\"1/4", },
362	{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 5\"1/4", },
363	/* 1.2 MB and low density 3"1/2 floppy 'aliases' */
364	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 3\"1/2", },
365	{ FDRIVE_DRV_144, FDRIVE_DISK_144, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 3\"1/2", },
366	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 3\"1/2", }, /* CP Backup 5.25" DD */
367	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 3\"1/2", },
368	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 3\"1/2", },
369	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 3\"1/2", },
370	{ FDRIVE_DRV_144, FDRIVE_DISK_720, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 3\"1/2", },
371	#ifdef VBOX /* For larger than real life floppy images (see DrvBlock.cpp). */
372	/* 15.6 MB fake floppy disk (just need something big). */
373	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_USER, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 15.6", },
374	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 15.6", },
375	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 15.6", },
376	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 15.6", },
377	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 15.6", },
378	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 15.6", },
379	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 15.6", },
380	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 15.6", },
381	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 15.6", },
382	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 15.6", },
383	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 15.6", },
384	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 15.6", },
385	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 15.6", },
386	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 15.6", },
387	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 15.6", },
388	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 15.6", },
389	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 15.6", },
390	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 15.6", },
391	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 15.6", },
392	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 15.6", },
393	{ FDRIVE_DRV_FAKE_15_6, FDRIVE_DISK_720, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 15.6", },
394	/* 63.5 MB fake floppy disk (just need something big). */
395	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_USER, 255, 255, 1, FDRIVE_RATE_1M, "63.5 MB fake 63.5", },
396	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_USER, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 63.5", },
397	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 63.5", },
398	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 63.5", },
399	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 63.5", },
400	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 63.5", },
401	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 63.5", },
402	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 63.5", },
403	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 63.5", },
404	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 63.5", },
405	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 63.5", },
406	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 63.5", },
407	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 63.5", },
408	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 63.5", },
409	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 63.5", },
410	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 63.5", },
411	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 63.5", },
412	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 63.5", },
413	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 63.5", },
414	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 63.5", },
415	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 63.5", },
416	{ FDRIVE_DRV_FAKE_63_5, FDRIVE_DISK_720, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 63.5", },
417	#endif
418	/* end */
419	{ FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, (uint8_t)-1, (uint8_t)-1, 0, (fdrive_rate_t)0, NULL, },
420	};
421
422	/* Revalidate a disk drive after a disk change */
423	static void fd_revalidate(fdrive_t *drv)
424	{
425	const fd_format_t *parse;
426	uint64_t nb_sectors, size;
427	int i, first_match, match;
428	int nb_heads, max_track, last_sect, ro;
429
430	FLOPPY_DPRINTF("revalidate\n");
431	#ifndef VBOX
432	if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
433	ro = bdrv_is_read_only(drv->bs);
434	bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect);
435	#else /* VBOX */
436	if ( drv->pDrvMedia
437	&& drv->pDrvMount
438	&& drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
439	ro = drv->pDrvMedia->pfnIsReadOnly (drv->pDrvMedia);
440	nb_heads = max_track = last_sect = 0;
441	#endif /* VBOX */
442	if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
443	FLOPPY_DPRINTF("User defined disk (%d %d %d)",
444	nb_heads - 1, max_track, last_sect);
445	} else {
446	#ifndef VBOX
447	bdrv_get_geometry(drv->bs, &nb_sectors);
448	#else /* VBOX */
449	{
450	uint64_t size2 = drv->pDrvMedia->pfnGetSize (drv->pDrvMedia);
451	nb_sectors = size2 / FD_SECTOR_LEN;
452	}
453	#endif /* VBOX */
454	match = -1;
455	first_match = -1;
456	for (i = 0;; i++) {
457	parse = &fd_formats[i];
458	if (parse->drive == FDRIVE_DRV_NONE)
459	break;
460	if (drv->drive == parse->drive \|\|
461	drv->drive == FDRIVE_DRV_NONE) {
462	size = (parse->max_head + 1) * parse->max_track *
463	parse->last_sect;
464	if (nb_sectors == size) {
465	match = i;
466	break;
467	}
468	if (first_match == -1)
469	first_match = i;
470	}
471	}
472	if (match == -1) {
473	if (first_match == -1)
474	match = 1;
475	else
476	match = first_match;
477	parse = &fd_formats[match];
478	}
479	nb_heads = parse->max_head + 1;
480	max_track = parse->max_track;
481	last_sect = parse->last_sect;
482	drv->drive = parse->drive;
483	#ifdef VBOX
484	drv->media_rate = parse->rate;
485	#endif
486	FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
487	nb_heads, max_track, last_sect, ro ? "ro" : "rw");
488	LogRel(("FDC: %s floppy disk (%d h %d t %d s) %s\n", parse->str,
489	nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
490	}
491	if (nb_heads == 1) {
492	drv->flags &= ~FDISK_DBL_SIDES;
493	} else {
494	drv->flags \|= FDISK_DBL_SIDES;
495	}
496	drv->max_track = max_track;
497	drv->last_sect = last_sect;
498	drv->ro = ro;
499	} else {
500	FLOPPY_DPRINTF("No disk in drive\n");
501	drv->last_sect = 0;
502	drv->max_track = 0;
503	drv->flags &= ~FDISK_DBL_SIDES;
504	drv->dsk_chg = true; /* Disk change line active. */
505	}
506	}
507
508	/********************************************************/
509	/* Intel 82078 floppy disk controller emulation */
510
511	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
512	static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
513	#ifndef VBOX
514	static int fdctrl_transfer_handler (void *opaque, int nchan,
515	int dma_pos, int dma_len);
516	#else /* VBOX: */
517	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
518	void *opaque,
519	unsigned nchan,
520	uint32_t dma_pos,
521	uint32_t dma_len);
522	#endif /* VBOX */
523	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0);
524	static fdrive_t get_cur_drv(fdctrl_t fdctrl);
525
526	static void fdctrl_result_timer(void *opaque);
527	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
528	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
529	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
530	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
531	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
532	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
533	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
534	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
535	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
536	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
537	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
538	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
539
540	enum {
541	FD_DIR_WRITE = 0,
542	FD_DIR_READ = 1,
543	FD_DIR_SCANE = 2,
544	FD_DIR_SCANL = 3,
545	FD_DIR_SCANH = 4,
546	FD_DIR_FORMAT = 5
547	};
548
549	enum {
550	FD_STATE_MULTI = 0x01, /* multi track flag */
551	FD_STATE_FORMAT = 0x02, /* format flag */
552	FD_STATE_SEEK = 0x04 /* seek flag */
553	};
554
555	enum {
556	FD_REG_SRA = 0x00,
557	FD_REG_SRB = 0x01,
558	FD_REG_DOR = 0x02,
559	FD_REG_TDR = 0x03,
560	FD_REG_MSR = 0x04,
561	FD_REG_DSR = 0x04,
562	FD_REG_FIFO = 0x05,
563	FD_REG_DIR = 0x07,
564	FD_REG_CCR = 0x07
565	};
566
567	enum {
568	FD_CMD_READ_TRACK = 0x02,
569	FD_CMD_SPECIFY = 0x03,
570	FD_CMD_SENSE_DRIVE_STATUS = 0x04,
571	FD_CMD_WRITE = 0x05,
572	FD_CMD_READ = 0x06,
573	FD_CMD_RECALIBRATE = 0x07,
574	FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
575	FD_CMD_WRITE_DELETED = 0x09,
576	FD_CMD_READ_ID = 0x0a,
577	FD_CMD_READ_DELETED = 0x0c,
578	FD_CMD_FORMAT_TRACK = 0x0d,
579	FD_CMD_DUMPREG = 0x0e,
580	FD_CMD_SEEK = 0x0f,
581	FD_CMD_VERSION = 0x10,
582	FD_CMD_SCAN_EQUAL = 0x11,
583	FD_CMD_PERPENDICULAR_MODE = 0x12,
584	FD_CMD_CONFIGURE = 0x13,
585	FD_CMD_LOCK = 0x14,
586	FD_CMD_VERIFY = 0x16,
587	FD_CMD_POWERDOWN_MODE = 0x17,
588	FD_CMD_PART_ID = 0x18,
589	FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
590	FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
591	FD_CMD_SAVE = 0x2e,
592	FD_CMD_OPTION = 0x33,
593	FD_CMD_RESTORE = 0x4e,
594	FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
595	FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
596	FD_CMD_FORMAT_AND_WRITE = 0xcd,
597	FD_CMD_RELATIVE_SEEK_IN = 0xcf
598	};
599
600	enum {
601	FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
602	FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
603	FD_CONFIG_POLL = 0x10, /* Poll enabled */
604	FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
605	FD_CONFIG_EIS = 0x40 /* No implied seeks */
606	};
607
608	enum {
609	FD_SR0_EQPMT = 0x10,
610	FD_SR0_SEEK = 0x20,
611	FD_SR0_ABNTERM = 0x40,
612	FD_SR0_INVCMD = 0x80,
613	FD_SR0_RDYCHG = 0xc0
614	};
615
616	enum {
617	FD_SR1_MA = 0x01, /* Missing address mark */
618	FD_SR1_NW = 0x02, /* Not writable */
619	FD_SR1_ND = 0x04, /* No data */
620	FD_SR1_EC = 0x80 /* End of cylinder */
621	};
622
623	enum {
624	FD_SR2_MD = 0x01, /* Missing data address mark */
625	FD_SR2_SNS = 0x04, /* Scan not satisfied */
626	FD_SR2_SEH = 0x08 /* Scan equal hit */
627	};
628
629	enum {
630	FD_SRA_DIR = 0x01,
631	FD_SRA_nWP = 0x02,
632	FD_SRA_nINDX = 0x04,
633	FD_SRA_HDSEL = 0x08,
634	FD_SRA_nTRK0 = 0x10,
635	FD_SRA_STEP = 0x20,
636	FD_SRA_nDRV2 = 0x40,
637	FD_SRA_INTPEND = 0x80
638	};
639
640	enum {
641	FD_SRB_MTR0 = 0x01,
642	FD_SRB_MTR1 = 0x02,
643	FD_SRB_WGATE = 0x04,
644	FD_SRB_RDATA = 0x08,
645	FD_SRB_WDATA = 0x10,
646	FD_SRB_DR0 = 0x20
647	};
648
649	enum {
650	#if MAX_FD == 4
651	FD_DOR_SELMASK = 0x03,
652	#else
653	FD_DOR_SELMASK = 0x01,
654	#endif
655	FD_DOR_nRESET = 0x04,
656	FD_DOR_DMAEN = 0x08,
657	FD_DOR_MOTEN0 = 0x10,
658	FD_DOR_MOTEN1 = 0x20,
659	FD_DOR_MOTEN2 = 0x40,
660	FD_DOR_MOTEN3 = 0x80
661	};
662
663	enum {
664	#if MAX_FD == 4
665	FD_TDR_BOOTSEL = 0x0c
666	#else
667	FD_TDR_BOOTSEL = 0x04
668	#endif
669	};
670
671	enum {
672	FD_DSR_DRATEMASK= 0x03,
673	FD_DSR_PWRDOWN = 0x40,
674	FD_DSR_SWRESET = 0x80
675	};
676
677	enum {
678	FD_MSR_DRV0BUSY = 0x01,
679	FD_MSR_DRV1BUSY = 0x02,
680	FD_MSR_DRV2BUSY = 0x04,
681	FD_MSR_DRV3BUSY = 0x08,
682	FD_MSR_CMDBUSY = 0x10,
683	FD_MSR_NONDMA = 0x20,
684	FD_MSR_DIO = 0x40,
685	FD_MSR_RQM = 0x80
686	};
687
688	enum {
689	FD_DIR_DSKCHG = 0x80
690	};
691
692	#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
693	#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
694	#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
695
696	#ifdef VBOX
697	/**
698	* Floppy controller state.
699	*
700	* @implements PDMILEDPORTS
701	*/
702	#endif
703	struct fdctrl_t {
704	#ifndef VBOX
705	fdctrl_t *fdctrl;
706	#endif
707	/* Controller's identification */
708	uint8_t version;
709	/* HW */
710	#ifndef VBOX
711	int irq;
712	int dma_chann;
713	#else
714	uint8_t irq_lvl;
715	uint8_t dma_chann;
716	#endif
717	uint32_t io_base;
718	/* Controller state */
719	#ifndef VBOX
720	QEMUTimer *result_timer;
721	#else
722	struct TMTIMER *result_timer;
723	#endif
724	uint8_t sra;
725	uint8_t srb;
726	uint8_t dor;
727	uint8_t tdr;
728	uint8_t dsr;
729	uint8_t msr;
730	uint8_t cur_drv;
731	uint8_t status0;
732	uint8_t status1;
733	uint8_t status2;
734	/* Command FIFO */
735	uint8_t fifo[FD_SECTOR_LEN];
736	uint32_t data_pos;
737	uint32_t data_len;
738	uint8_t data_state;
739	uint8_t data_dir;
740	uint8_t eot; /* last wanted sector */
741	/* States kept only to be returned back */
742	/* Timers state */
743	uint8_t timer0;
744	uint8_t timer1;
745	/* precompensation */
746	uint8_t precomp_trk;
747	uint8_t config;
748	uint8_t lock;
749	/* Power down config (also with status regB access mode */
750	uint8_t pwrd;
751	/* Floppy drives */
752	uint8_t num_floppies;
753	fdrive_t drives[MAX_FD];
754	uint8_t reset_sensei;
755	#ifdef VBOX
756	/** Pointer to device instance. */
757	PPDMDEVINS pDevIns;
758
759	/** Status LUN: The base interface. */
760	PDMIBASE IBaseStatus;
761	/** Status LUN: The Leds interface. */
762	PDMILEDPORTS ILeds;
763	/** Status LUN: The Partner of ILeds. */
764	PPDMILEDCONNECTORS pLedsConnector;
765	#endif
766	};
767
768	static uint32_t fdctrl_read (void *opaque, uint32_t reg)
769	{
770	fdctrl_t fdctrl = (fdctrl_t )opaque;
771	uint32_t retval;
772
773	switch (reg) {
774	case FD_REG_SRA:
775	retval = fdctrl_read_statusA(fdctrl);
776	break;
777	case FD_REG_SRB:
778	retval = fdctrl_read_statusB(fdctrl);
779	break;
780	case FD_REG_DOR:
781	retval = fdctrl_read_dor(fdctrl);
782	break;
783	case FD_REG_TDR:
784	retval = fdctrl_read_tape(fdctrl);
785	break;
786	case FD_REG_MSR:
787	retval = fdctrl_read_main_status(fdctrl);
788	break;
789	case FD_REG_FIFO:
790	retval = fdctrl_read_data(fdctrl);
791	break;
792	case FD_REG_DIR:
793	retval = fdctrl_read_dir(fdctrl);
794	break;
795	default:
796	retval = (uint32_t)(-1);
797	break;
798	}
799	FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
800
801	return retval;
802	}
803
804	static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
805	{
806	fdctrl_t fdctrl = (fdctrl_t )opaque;
807
808	FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
809
810	switch (reg) {
811	case FD_REG_DOR:
812	fdctrl_write_dor(fdctrl, value);
813	break;
814	case FD_REG_TDR:
815	fdctrl_write_tape(fdctrl, value);
816	break;
817	case FD_REG_DSR:
818	fdctrl_write_rate(fdctrl, value);
819	break;
820	case FD_REG_FIFO:
821	fdctrl_write_data(fdctrl, value);
822	break;
823	case FD_REG_CCR:
824	fdctrl_write_ccr(fdctrl, value);
825	break;
826	default:
827	break;
828	}
829	}
830
831	/* Change IRQ state */
832	static void fdctrl_reset_irq(fdctrl_t *fdctrl)
833	{
834	if (!(fdctrl->sra & FD_SRA_INTPEND))
835	return;
836	FLOPPY_DPRINTF("Reset interrupt\n");
837	#ifdef VBOX
838	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
839	#else
840	qemu_set_irq(fdctrl->irq, 0);
841	#endif
842	fdctrl->sra &= ~FD_SRA_INTPEND;
843	}
844
845	static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
846	{
847	if (!(fdctrl->sra & FD_SRA_INTPEND)) {
848	FLOPPY_DPRINTF("Raising interrupt...\n");
849	#ifdef VBOX
850	PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
851	#else
852	qemu_set_irq(fdctrl->irq, 1);
853	#endif
854	fdctrl->sra \|= FD_SRA_INTPEND;
855	}
856	if (status0 & FD_SR0_SEEK) {
857	fdrive_t *cur_drv;
858
859	/* A seek clears the disk change line (if a disk is inserted). */
860	cur_drv = get_cur_drv(fdctrl);
861	if (cur_drv->max_track)
862	cur_drv->dsk_chg = false;
863	}
864
865	fdctrl->reset_sensei = 0;
866	fdctrl->status0 = status0;
867	FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
868	}
869
870	/* Reset controller */
871	static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
872	{
873	int i;
874
875	FLOPPY_DPRINTF("reset controller\n");
876	fdctrl_reset_irq(fdctrl);
877	/* Initialise controller */
878	fdctrl->sra = 0;
879	fdctrl->srb = 0xc0;
880	#ifdef VBOX
881	if (!fdctrl->drives[1].pDrvMedia)
882	#else
883	if (!fdctrl->drives[1].bs)
884	#endif
885	fdctrl->sra \|= FD_SRA_nDRV2;
886	fdctrl->cur_drv = 0;
887	fdctrl->dor = FD_DOR_nRESET;
888	fdctrl->dor \|= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
889	fdctrl->msr = FD_MSR_RQM;
890	/* FIFO state */
891	fdctrl->data_pos = 0;
892	fdctrl->data_len = 0;
893	fdctrl->data_state = 0;
894	fdctrl->data_dir = FD_DIR_WRITE;
895	for (i = 0; i < MAX_FD; i++)
896	fd_recalibrate(&fdctrl->drives[i]);
897	fdctrl_reset_fifo(fdctrl);
898	if (do_irq) {
899	fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
900	fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
901	}
902	}
903
904	static inline fdrive_t drv0(fdctrl_t fdctrl)
905	{
906	return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
907	}
908
909	static inline fdrive_t drv1(fdctrl_t fdctrl)
910	{
911	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
912	return &fdctrl->drives[1];
913	else
914	return &fdctrl->drives[0];
915	}
916
917	#if MAX_FD == 4
918	static inline fdrive_t drv2(fdctrl_t fdctrl)
919	{
920	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
921	return &fdctrl->drives[2];
922	else
923	return &fdctrl->drives[1];
924	}
925
926	static inline fdrive_t drv3(fdctrl_t fdctrl)
927	{
928	if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
929	return &fdctrl->drives[3];
930	else
931	return &fdctrl->drives[2];
932	}
933	#endif
934
935	static fdrive_t get_cur_drv(fdctrl_t fdctrl)
936	{
937	switch (fdctrl->cur_drv) {
938	case 0: return drv0(fdctrl);
939	case 1: return drv1(fdctrl);
940	#if MAX_FD == 4
941	case 2: return drv2(fdctrl);
942	case 3: return drv3(fdctrl);
943	#endif
944	default: return NULL;
945	}
946	}
947
948	/* Status A register : 0x00 (read-only) */
949	static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
950	{
951	uint32_t retval = fdctrl->sra;
952
953	FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
954
955	return retval;
956	}
957
958	/* Status B register : 0x01 (read-only) */
959	static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
960	{
961	uint32_t retval = fdctrl->srb;
962
963	FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
964
965	return retval;
966	}
967
968	/* Digital output register : 0x02 */
969	static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
970	{
971	uint32_t retval = fdctrl->dor;
972
973	/* Selected drive */
974	retval \|= fdctrl->cur_drv;
975	FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
976
977	return retval;
978	}
979
980	static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
981	{
982	FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
983
984	/* Motors */
985	if (value & FD_DOR_MOTEN0)
986	fdctrl->srb \|= FD_SRB_MTR0;
987	else
988	fdctrl->srb &= ~FD_SRB_MTR0;
989	if (value & FD_DOR_MOTEN1)
990	fdctrl->srb \|= FD_SRB_MTR1;
991	else
992	fdctrl->srb &= ~FD_SRB_MTR1;
993
994	/* Drive */
995	if (value & 1)
996	fdctrl->srb \|= FD_SRB_DR0;
997	else
998	fdctrl->srb &= ~FD_SRB_DR0;
999
1000	/* Reset */
1001	if (!(value & FD_DOR_nRESET)) {
1002	if (fdctrl->dor & FD_DOR_nRESET) {
1003	FLOPPY_DPRINTF("controller enter RESET state\n");
1004	}
1005	} else {
1006	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1007	FLOPPY_DPRINTF("controller out of RESET state\n");
1008	fdctrl_reset(fdctrl, 1);
1009	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1010	}
1011	}
1012	/* Selected drive */
1013	fdctrl->cur_drv = value & FD_DOR_SELMASK;
1014
1015	fdctrl->dor = value;
1016	}
1017
1018	/* Tape drive register : 0x03 */
1019	static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
1020	{
1021	uint32_t retval = fdctrl->tdr;
1022
1023	FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
1024
1025	return retval;
1026	}
1027
1028	static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
1029	{
1030	/* Reset mode */
1031	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1032	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1033	return;
1034	}
1035	FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
1036	/* Disk boot selection indicator */
1037	fdctrl->tdr = value & FD_TDR_BOOTSEL;
1038	/* Tape indicators: never allow */
1039	}
1040
1041	/* Main status register : 0x04 (read) */
1042	static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
1043	{
1044	uint32_t retval = fdctrl->msr;
1045
1046	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1047	fdctrl->dor \|= FD_DOR_nRESET;
1048
1049	FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
1050
1051	return retval;
1052	}
1053
1054	/* Data select rate register : 0x04 (write) */
1055	static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
1056	{
1057	/* Reset mode */
1058	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1059	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1060	return;
1061	}
1062	FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
1063	/* Reset: autoclear */
1064	if (value & FD_DSR_SWRESET) {
1065	fdctrl->dor &= ~FD_DOR_nRESET;
1066	fdctrl_reset(fdctrl, 1);
1067	fdctrl->dor \|= FD_DOR_nRESET;
1068	}
1069	if (value & FD_DSR_PWRDOWN) {
1070	fdctrl_reset(fdctrl, 1);
1071	}
1072	fdctrl->dsr = value;
1073	}
1074
1075	/* Configuration control register : 0x07 (write) */
1076	static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
1077	{
1078	/* Reset mode */
1079	if (!(fdctrl->dor & FD_DOR_nRESET)) {
1080	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
1081	return;
1082	}
1083	FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
1084
1085	/* Only the rate selection bits used in AT mode, and we
1086	* store those in the DSR.
1087	*/
1088	fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) \| (value & FD_DSR_DRATEMASK);
1089	}
1090
1091	static int fdctrl_media_changed(fdrive_t *drv)
1092	{
1093	#ifdef VBOX
1094	return drv->dsk_chg;
1095	#else
1096	int ret;
1097
1098	if (!drv->bs)
1099	return 0;
1100	ret = bdrv_media_changed(drv->bs);
1101	if (ret) {
1102	fd_revalidate(drv);
1103	}
1104	return ret;
1105	#endif
1106	}
1107
1108	/* Digital input register : 0x07 (read-only) */
1109	static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
1110	{
1111	uint32_t retval = 0;
1112
1113	#ifdef VBOX
1114	/* The change line signal is reported by the currently selected
1115	* drive. If the corresponding motor on bit is not set, the drive
1116	* is not selected!
1117	*/
1118	if (fdctrl_media_changed(get_cur_drv(fdctrl))
1119	&& (fdctrl->dor & (0x10 << fdctrl->cur_drv)))
1120	#else
1121	if (fdctrl_media_changed(drv0(fdctrl))
1122	\|\| fdctrl_media_changed(drv1(fdctrl))
1123	#if MAX_FD == 4
1124	\|\| fdctrl_media_changed(drv2(fdctrl))
1125	\|\| fdctrl_media_changed(drv3(fdctrl))
1126	#endif
1127	)
1128	#endif
1129	retval \|= FD_DIR_DSKCHG;
1130	if (retval != 0)
1131	FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
1132
1133	return retval;
1134	}
1135
1136	/* FIFO state control */
1137	static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
1138	{
1139	fdctrl->data_dir = FD_DIR_WRITE;
1140	fdctrl->data_pos = 0;
1141	fdctrl->msr &= ~(FD_MSR_CMDBUSY \| FD_MSR_DIO);
1142	}
1143
1144	/* Set FIFO status for the host to read */
1145	static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
1146	{
1147	fdctrl->data_dir = FD_DIR_READ;
1148	fdctrl->data_len = fifo_len;
1149	fdctrl->data_pos = 0;
1150	fdctrl->msr \|= FD_MSR_CMDBUSY \| FD_MSR_RQM \| FD_MSR_DIO;
1151	if (do_irq)
1152	fdctrl_raise_irq(fdctrl, 0x00);
1153	}
1154
1155	/* Set an error: unimplemented/unknown command */
1156	static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
1157	{
1158	RT_NOREF(direction);
1159	FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
1160	fdctrl->fifo[0] = FD_SR0_INVCMD;
1161	fdctrl_set_fifo(fdctrl, 1, 0);
1162	}
1163
1164	/* Seek to next sector */
1165	static int fdctrl_seek_to_next_sect(fdctrl_t fdctrl, fdrive_t cur_drv)
1166	{
1167	FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
1168	cur_drv->head, cur_drv->track, cur_drv->sect,
1169	fd_sector(cur_drv));
1170	/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
1171	error in fact */
1172	if (cur_drv->sect >= cur_drv->last_sect \|\|
1173	cur_drv->sect == fdctrl->eot) {
1174	cur_drv->sect = 1;
1175	if (FD_MULTI_TRACK(fdctrl->data_state)) {
1176	if (cur_drv->head == 0 &&
1177	(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
1178	cur_drv->head = 1;
1179	} else {
1180	cur_drv->head = 0;
1181	cur_drv->ltrk++;
1182	if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
1183	return 0;
1184	}
1185	} else {
1186	cur_drv->ltrk++;
1187	return 0;
1188	}
1189	FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
1190	cur_drv->head, cur_drv->track,
1191	cur_drv->sect, fd_sector(cur_drv));
1192	} else {
1193	cur_drv->sect++;
1194	}
1195	return 1;
1196	}
1197
1198	/* Callback for transfer end (stop or abort) */
1199	static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
1200	uint8_t status1, uint8_t status2)
1201	{
1202	fdrive_t *cur_drv;
1203
1204	cur_drv = get_cur_drv(fdctrl);
1205	FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
1206	status0, status1, status2,
1207	status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl));
1208	fdctrl->fifo[0] = status0 \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
1209	fdctrl->fifo[1] = status1;
1210	fdctrl->fifo[2] = status2;
1211	fdctrl->fifo[3] = cur_drv->ltrk;
1212	fdctrl->fifo[4] = cur_drv->head;
1213	fdctrl->fifo[5] = cur_drv->sect;
1214	fdctrl->fifo[6] = FD_SECTOR_SC;
1215	FLOPPY_DPRINTF("ST0:%02x ST1:%02x ST2:%02x C:%02x H:%02x R:%02x N:%02x\n",
1216	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2], fdctrl->fifo[3],
1217	fdctrl->fifo[4], fdctrl->fifo[5], fdctrl->fifo[6]);
1218
1219	fdctrl->data_dir = FD_DIR_READ;
1220	if (!(fdctrl->msr & FD_MSR_NONDMA)) {
1221	#ifdef VBOX
1222	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
1223	#else
1224	DMA_release_DREQ(fdctrl->dma_chann);
1225	#endif
1226	}
1227	fdctrl->msr \|= FD_MSR_RQM \| FD_MSR_DIO;
1228	fdctrl->msr &= ~FD_MSR_NONDMA;
1229	fdctrl_set_fifo(fdctrl, 7, 1);
1230	}
1231
1232	/* Prepare a data transfer (either DMA or FIFO) */
1233	static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
1234	{
1235	fdrive_t *cur_drv;
1236	uint8_t kh, kt, ks;
1237	int did_seek = 0;
1238
1239	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1240	cur_drv = get_cur_drv(fdctrl);
1241	kt = fdctrl->fifo[2];
1242	kh = fdctrl->fifo[3];
1243	ks = fdctrl->fifo[4];
1244	FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
1245	GET_CUR_DRV(fdctrl), kh, kt, ks,
1246	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1247	FLOPPY_DPRINTF("CMD:%02x SEL:%02x C:%02x H:%02x R:%02x N:%02x EOT:%02x GPL:%02x DTL:%02x\n",
1248	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
1249	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5],
1250	fdctrl->fifo[6], fdctrl->fifo[7], fdctrl->fifo[8]);
1251	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1252	case 2:
1253	/* sect too big */
1254	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1255	fdctrl->fifo[3] = kt;
1256	fdctrl->fifo[4] = kh;
1257	fdctrl->fifo[5] = ks;
1258	return;
1259	case 3:
1260	/* track too big */
1261	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1262	fdctrl->fifo[3] = kt;
1263	fdctrl->fifo[4] = kh;
1264	fdctrl->fifo[5] = ks;
1265	return;
1266	case 4:
1267	/* No seek enabled */
1268	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1269	fdctrl->fifo[3] = kt;
1270	fdctrl->fifo[4] = kh;
1271	fdctrl->fifo[5] = ks;
1272	return;
1273	case 5:
1274	/* No disk in drive */
1275	/// @todo This is wrong! Command should not complete.
1276	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| 0x08, /FD_SR1_MA \|/ FD_SR1_ND, 0x00);
1277	fdctrl->fifo[3] = kt;
1278	fdctrl->fifo[4] = kh;
1279	fdctrl->fifo[5] = ks;
1280	return;
1281	case 1:
1282	did_seek = 1;
1283	break;
1284	default:
1285	break;
1286	}
1287	/* Check the data rate. If the programmed data rate does not match
1288	* the currently inserted medium, the operation has to fail.
1289	*/
1290	#ifdef VBOX
1291	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1292	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1293	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1294	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1295	fdctrl->fifo[3] = kt;
1296	fdctrl->fifo[4] = kh;
1297	fdctrl->fifo[5] = ks;
1298	return;
1299	}
1300	#endif
1301	/* Set the FIFO state */
1302	fdctrl->data_dir = direction;
1303	fdctrl->data_pos = 0;
1304	fdctrl->msr \|= FD_MSR_CMDBUSY;
1305	if (fdctrl->fifo[0] & 0x80)
1306	fdctrl->data_state \|= FD_STATE_MULTI;
1307	else
1308	fdctrl->data_state &= ~FD_STATE_MULTI;
1309	if (did_seek)
1310	fdctrl->data_state \|= FD_STATE_SEEK;
1311	else
1312	fdctrl->data_state &= ~FD_STATE_SEEK;
1313	if (fdctrl->fifo[5] == 00) {
1314	fdctrl->data_len = fdctrl->fifo[8];
1315	} else {
1316	int tmp;
1317	fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
1318	tmp = (fdctrl->fifo[6] - ks + 1);
1319	if (fdctrl->fifo[0] & 0x80)
1320	tmp += fdctrl->fifo[6];
1321	fdctrl->data_len *= tmp;
1322	}
1323	fdctrl->eot = fdctrl->fifo[6];
1324	if (fdctrl->dor & FD_DOR_DMAEN) {
1325	int dma_mode;
1326	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1327	#ifndef VBOX
1328	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1329	#else
1330	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1331	#endif
1332	dma_mode = (dma_mode >> 2) & 3;
1333	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1334	dma_mode, direction,
1335	(128 << fdctrl->fifo[5]) *
1336	(cur_drv->last_sect - ks + 1), fdctrl->data_len);
1337	if (((direction == FD_DIR_SCANE \|\| direction == FD_DIR_SCANL \|\|
1338	direction == FD_DIR_SCANH) && dma_mode == 0) \|\|
1339	(direction == FD_DIR_WRITE && dma_mode == 2) \|\|
1340	(direction == FD_DIR_READ && (dma_mode == 1 \|\| dma_mode == 0))) {
1341	/* No access is allowed until DMA transfer has completed */
1342	fdctrl->msr &= ~FD_MSR_RQM;
1343	/* Now, we just have to wait for the DMA controller to
1344	* recall us...
1345	*/
1346	#ifndef VBOX
1347	DMA_hold_DREQ(fdctrl->dma_chann);
1348	DMA_schedule(fdctrl->dma_chann);
1349	#else
1350	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1351	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1352	#endif
1353	return;
1354	} else {
1355	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
1356	}
1357	}
1358	FLOPPY_DPRINTF("start non-DMA transfer\n");
1359	fdctrl->msr \|= FD_MSR_NONDMA;
1360	if (direction != FD_DIR_WRITE)
1361	fdctrl->msr \|= FD_MSR_DIO;
1362	/* IO based transfer: calculate len */
1363	fdctrl_raise_irq(fdctrl, 0x00);
1364
1365	return;
1366	}
1367
1368	/* Prepare a format data transfer (either DMA or FIFO) */
1369	static void fdctrl_start_format(fdctrl_t *fdctrl)
1370	{
1371	fdrive_t *cur_drv;
1372	uint8_t ns, dp, kh, kt, ks;
1373
1374	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1375	cur_drv = get_cur_drv(fdctrl);
1376	kt = cur_drv->track;
1377	kh = (fdctrl->fifo[1] & 0x04) >> 2;
1378	ns = fdctrl->fifo[3];
1379	dp = fdctrl->fifo[5];
1380	ks = 1;
1381	FLOPPY_DPRINTF("Start format at %d %d %02x, %d sect, pat %02x (%d)\n",
1382	GET_CUR_DRV(fdctrl), kh, kt, ns, dp,
1383	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1384	switch (fd_seek(cur_drv, kh, kt, ks, false)) {
1385	case 2:
1386	/* sect too big */
1387	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1388	fdctrl->fifo[3] = kt;
1389	fdctrl->fifo[4] = kh;
1390	fdctrl->fifo[5] = ks;
1391	return;
1392	case 3:
1393	/* track too big */
1394	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1395	fdctrl->fifo[3] = kt;
1396	fdctrl->fifo[4] = kh;
1397	fdctrl->fifo[5] = ks;
1398	return;
1399	case 4:
1400	/* No seek enabled */
1401	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1402	fdctrl->fifo[3] = kt;
1403	fdctrl->fifo[4] = kh;
1404	fdctrl->fifo[5] = ks;
1405	return;
1406	case 5:
1407	/* No disk in drive */
1408	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1409	fdctrl->fifo[3] = kt;
1410	fdctrl->fifo[4] = kh;
1411	fdctrl->fifo[5] = ks;
1412	return;
1413	case 1:
1414	break;
1415	default:
1416	break;
1417	}
1418	/* It's not clear what should happen if the data rate does not match. */
1419	#if 0
1420	/* Check the data rate. If the programmed data rate does not match
1421	* the currently inserted medium, the operation has to fail.
1422	*/
1423	if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
1424	FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
1425	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
1426	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
1427	fdctrl->fifo[3] = kt;
1428	fdctrl->fifo[4] = kh;
1429	fdctrl->fifo[5] = ks;
1430	return;
1431	}
1432	#endif
1433	/* Set the FIFO state */
1434	fdctrl->data_dir = FD_DIR_FORMAT;
1435	fdctrl->data_pos = 0;
1436	fdctrl->msr \|= FD_MSR_CMDBUSY;
1437	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
1438	fdctrl->data_len = ns * 4;
1439	fdctrl->eot = ns;
1440	if (fdctrl->dor & FD_DOR_DMAEN) {
1441	int dma_mode;
1442	/* DMA transfer are enabled. Check if DMA channel is well programmed */
1443	#ifndef VBOX
1444	dma_mode = DMA_get_channel_mode(fdctrl->dma_chann);
1445	#else
1446	dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
1447	#endif
1448	dma_mode = (dma_mode >> 2) & 3;
1449	FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
1450	dma_mode, fdctrl->data_dir,
1451	(128 << fdctrl->fifo[2]) *
1452	(cur_drv->last_sect + 1), fdctrl->data_len);
1453	if (fdctrl->data_dir == FD_DIR_FORMAT && dma_mode == 2) {
1454	/* No access is allowed until DMA transfer has completed */
1455	fdctrl->msr &= ~FD_MSR_RQM;
1456	/* Now, we just have to wait for the DMA controller to
1457	* recall us...
1458	*/
1459	#ifndef VBOX
1460	DMA_hold_DREQ(fdctrl->dma_chann);
1461	DMA_schedule(fdctrl->dma_chann);
1462	#else
1463	PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
1464	PDMDevHlpDMASchedule (fdctrl->pDevIns);
1465	#endif
1466	return;
1467	} else {
1468	FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, fdctrl->data_dir);
1469	}
1470	}
1471	FLOPPY_DPRINTF("start non-DMA format\n");
1472	fdctrl->msr \|= FD_MSR_NONDMA;
1473	/* IO based transfer: calculate len */
1474	fdctrl_raise_irq(fdctrl, 0x00);
1475
1476	return;
1477	}
1478
1479	/* Prepare a transfer of deleted data */
1480	static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
1481	{
1482	RT_NOREF(direction);
1483	FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
1484
1485	/* We don't handle deleted data,
1486	* so we don't return ANYTHING
1487	*/
1488	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1489	}
1490
1491	#ifdef VBOX
1492	/* Block driver read/write wrappers. */
1493
1494	static int blk_write(fdrive_t drv, int64_t sector_num, const uint8_t buf, int nb_sectors)
1495	{
1496	int rc;
1497
1498	drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
1499
1500	rc = drv->pDrvMedia->pfnWrite(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1501	buf, nb_sectors * FD_SECTOR_LEN);
1502
1503	drv->Led.Actual.s.fWriting = 0;
1504	if (RT_FAILURE(rc))
1505	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1506
1507	return rc;
1508	}
1509
1510	static int blk_read(fdrive_t drv, int64_t sector_num, uint8_t buf, int nb_sectors)
1511	{
1512	int rc;
1513
1514	drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
1515
1516	rc = drv->pDrvMedia->pfnRead(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
1517	buf, nb_sectors * FD_SECTOR_LEN);
1518
1519	drv->Led.Actual.s.fReading = 0;
1520
1521	if (RT_FAILURE(rc))
1522	AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
1523
1524	return rc;
1525	}
1526
1527	#endif
1528
1529	/* handlers for DMA transfers */
1530	#ifdef VBOX
1531	static DECLCALLBACK(uint32_t) fdctrl_transfer_handler (PPDMDEVINS pDevIns,
1532	void *opaque,
1533	unsigned nchan,
1534	uint32_t dma_pos,
1535	uint32_t dma_len)
1536	#else
1537	static int fdctrl_transfer_handler (void *opaque, int nchan,
1538	int dma_pos, int dma_len)
1539	#endif
1540	{
1541	RT_NOREF(pDevIns, dma_pos);
1542	fdctrl_t *fdctrl;
1543	fdrive_t *cur_drv;
1544	#ifdef VBOX
1545	int rc;
1546	uint32_t len = 0;
1547	uint32_t start_pos, rel_pos;
1548	#else
1549	int len, start_pos, rel_pos;
1550	#endif
1551	uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
1552
1553	fdctrl = (fdctrl_t *)opaque;
1554	if (fdctrl->msr & FD_MSR_RQM) {
1555	FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
1556	return 0;
1557	}
1558	cur_drv = get_cur_drv(fdctrl);
1559	if (fdctrl->data_dir == FD_DIR_SCANE \|\| fdctrl->data_dir == FD_DIR_SCANL \|\|
1560	fdctrl->data_dir == FD_DIR_SCANH)
1561	status2 = FD_SR2_SNS;
1562	if (dma_len > fdctrl->data_len)
1563	dma_len = fdctrl->data_len;
1564	#ifndef VBOX
1565	if (cur_drv->bs == NULL)
1566	#else /* !VBOX */
1567	if (cur_drv->pDrvMedia == NULL)
1568	#endif
1569	{
1570	if (fdctrl->data_dir == FD_DIR_WRITE)
1571	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1572	else
1573	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1574	Assert(len == 0);
1575	goto transfer_error;
1576	}
1577
1578	#ifdef VBOX
1579	if (cur_drv->ro)
1580	{
1581	if (fdctrl->data_dir == FD_DIR_WRITE \|\| fdctrl->data_dir == FD_DIR_FORMAT)
1582	{
1583	/* Handle readonly medium early, no need to do DMA, touch the
1584	* LED or attempt any writes. A real floppy doesn't attempt
1585	* to write to readonly media either. */
1586	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, FD_SR1_NW,
1587	0x00);
1588	Assert(len == 0);
1589	goto transfer_error;
1590	}
1591	}
1592	#endif
1593
1594
1595	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1596	for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
1597	len = dma_len - fdctrl->data_pos;
1598	if (len + rel_pos > FD_SECTOR_LEN)
1599	len = FD_SECTOR_LEN - rel_pos;
1600	FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
1601	"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
1602	fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
1603	cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
1604	fd_sector(cur_drv) * FD_SECTOR_LEN);
1605	if (fdctrl->data_dir != FD_DIR_FORMAT &&
1606	(fdctrl->data_dir != FD_DIR_WRITE \|\|
1607	len < FD_SECTOR_LEN \|\| rel_pos != 0)) {
1608	/* READ & SCAN commands and realign to a sector for WRITE */
1609	#ifdef VBOX
1610	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1611	if (RT_FAILURE(rc))
1612	#else
1613	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
1614	fdctrl->fifo, 1) < 0)
1615	#endif
1616	{
1617	FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
1618	fd_sector(cur_drv));
1619	/* Sure, image size is too small... */
1620	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1621	}
1622	}
1623	switch (fdctrl->data_dir) {
1624	case FD_DIR_READ:
1625	/* READ commands */
1626	#ifdef VBOX
1627	{
1628	uint32_t read;
1629	int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, nchan,
1630	fdctrl->fifo + rel_pos,
1631	fdctrl->data_pos,
1632	len, &read);
1633	AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
1634	}
1635	#else
1636	DMA_write_memory (nchan, fdctrl->fifo + rel_pos,
1637	fdctrl->data_pos, len);
1638	#endif
1639	/* cpu_physical_memory_write(addr + fdctrl->data_pos, */
1640	/* fdctrl->fifo + rel_pos, len); */
1641	break;
1642	case FD_DIR_WRITE:
1643	/* WRITE commands */
1644	#ifdef VBOX
1645	{
1646	uint32_t written;
1647	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1648	fdctrl->fifo + rel_pos,
1649	fdctrl->data_pos,
1650	len, &written);
1651	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1652	}
1653
1654	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1655	if (RT_FAILURE(rc))
1656	#else
1657	DMA_read_memory (nchan, fdctrl->fifo + rel_pos,
1658	fdctrl->data_pos, len);
1659	if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
1660	fdctrl->fifo, 1) < 0)
1661	#endif
1662	{
1663	FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
1664	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1665	goto transfer_error;
1666	}
1667	break;
1668	#ifdef VBOX
1669	case FD_DIR_FORMAT:
1670	/* FORMAT command */
1671	{
1672	uint8_t eot = fdctrl->fifo[3];
1673	uint8_t filler = fdctrl->fifo[5];
1674	uint32_t written;
1675	int sct;
1676	int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, nchan,
1677	fdctrl->fifo + rel_pos,
1678	fdctrl->data_pos,
1679	len, &written);
1680	AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
1681
1682	/* Fill the entire track with desired data pattern. */
1683	FLOPPY_DPRINTF("formatting track: %d sectors, pattern %02x\n",
1684	eot, filler);
1685	memset(fdctrl->fifo, filler, FD_SECTOR_LEN);
1686	for (sct = 0; sct < eot; ++sct)
1687	{
1688	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1689	if (RT_FAILURE(rc))
1690	{
1691	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1692	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1693	goto transfer_error;
1694	}
1695	fdctrl_seek_to_next_sect(fdctrl, cur_drv);
1696	}
1697	}
1698	break;
1699	#endif
1700	default:
1701	/* SCAN commands */
1702	{
1703	uint8_t tmpbuf[FD_SECTOR_LEN];
1704	int ret;
1705	#ifdef VBOX
1706	uint32_t read;
1707	int rc2 = PDMDevHlpDMAReadMemory (fdctrl->pDevIns, nchan, tmpbuf,
1708	fdctrl->data_pos, len, &read);
1709	AssertMsg(RT_SUCCESS(rc2), ("DMAReadMemory -> %Rrc2\n", rc2)); NOREF(rc2);
1710	#else
1711	DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len);
1712	#endif
1713	ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
1714	if (ret == 0) {
1715	status2 = FD_SR2_SEH;
1716	goto end_transfer;
1717	}
1718	if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) \|\|
1719	(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
1720	status2 = 0x00;
1721	goto end_transfer;
1722	}
1723	}
1724	break;
1725	}
1726	fdctrl->data_pos += len;
1727	rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
1728	if (rel_pos == 0) {
1729	/* Seek to next sector */
1730	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
1731	break;
1732	}
1733	}
1734	end_transfer:
1735	len = fdctrl->data_pos - start_pos;
1736	FLOPPY_DPRINTF("end transfer %d %d %d\n",
1737	fdctrl->data_pos, len, fdctrl->data_len);
1738	if (fdctrl->data_dir == FD_DIR_SCANE \|\|
1739	fdctrl->data_dir == FD_DIR_SCANL \|\|
1740	fdctrl->data_dir == FD_DIR_SCANH)
1741	status2 = FD_SR2_SEH;
1742	if (FD_DID_SEEK(fdctrl->data_state))
1743	status0 \|= FD_SR0_SEEK;
1744	fdctrl->data_len -= len;
1745	fdctrl_stop_transfer(fdctrl, status0, status1, status2);
1746	transfer_error:
1747
1748	return len;
1749	}
1750
1751	/* Data register : 0x05 */
1752	static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
1753	{
1754	fdrive_t *cur_drv;
1755	uint32_t retval = 0;
1756	unsigned pos;
1757	#ifdef VBOX
1758	int rc;
1759	#endif
1760
1761	cur_drv = get_cur_drv(fdctrl);
1762	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
1763	if (!(fdctrl->msr & FD_MSR_RQM) \|\| !(fdctrl->msr & FD_MSR_DIO)) {
1764	FLOPPY_ERROR("controller not ready for reading\n");
1765	return 0;
1766	}
1767	pos = fdctrl->data_pos % FD_SECTOR_LEN;
1768	if (fdctrl->msr & FD_MSR_NONDMA) {
1769	if (pos == 0) {
1770	if (fdctrl->data_pos != 0)
1771	if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
1772	FLOPPY_DPRINTF("error seeking to next sector %d\n",
1773	fd_sector(cur_drv));
1774	return 0;
1775	}
1776	#ifdef VBOX
1777	rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1778	if (RT_FAILURE(rc))
1779	#else
1780	if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0)
1781	#endif
1782	{
1783	FLOPPY_DPRINTF("error getting sector %d\n",
1784	fd_sector(cur_drv));
1785	/* Sure, image size is too small... */
1786	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1787	}
1788	}
1789	}
1790	retval = fdctrl->fifo[pos];
1791	if (++fdctrl->data_pos == fdctrl->data_len) {
1792	fdctrl->data_pos = 0;
1793	/* Switch from transfer mode to status mode
1794	* then from status mode to command mode
1795	*/
1796	if (fdctrl->msr & FD_MSR_NONDMA) {
1797	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1798	} else {
1799	fdctrl_reset_fifo(fdctrl);
1800	fdctrl_reset_irq(fdctrl);
1801	}
1802	}
1803	FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
1804
1805	return retval;
1806	}
1807
1808	static void fdctrl_format_sector(fdctrl_t *fdctrl)
1809	{
1810	fdrive_t *cur_drv;
1811	uint8_t kh, kt, ks;
1812	#ifdef VBOX
1813	int ok = 0, rc;
1814	#endif
1815
1816	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
1817	cur_drv = get_cur_drv(fdctrl);
1818	kt = fdctrl->fifo[6];
1819	kh = fdctrl->fifo[7];
1820	ks = fdctrl->fifo[8];
1821	FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
1822	GET_CUR_DRV(fdctrl), kh, kt, ks,
1823	fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
1824	switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
1825	case 2:
1826	/* sect too big */
1827	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1828	fdctrl->fifo[3] = kt;
1829	fdctrl->fifo[4] = kh;
1830	fdctrl->fifo[5] = ks;
1831	return;
1832	case 3:
1833	/* track too big */
1834	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
1835	fdctrl->fifo[3] = kt;
1836	fdctrl->fifo[4] = kh;
1837	fdctrl->fifo[5] = ks;
1838	return;
1839	case 4:
1840	/* No seek enabled */
1841	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
1842	fdctrl->fifo[3] = kt;
1843	fdctrl->fifo[4] = kh;
1844	fdctrl->fifo[5] = ks;
1845	return;
1846	case 5:
1847	/* No disk in drive */
1848	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
1849	fdctrl->fifo[3] = kt;
1850	fdctrl->fifo[4] = kh;
1851	fdctrl->fifo[5] = ks;
1852	return;
1853	case 1:
1854	fdctrl->data_state \|= FD_STATE_SEEK;
1855	break;
1856	default:
1857	break;
1858	}
1859	memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
1860	#ifdef VBOX
1861	if (cur_drv->pDrvMedia) {
1862	rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
1863	if (RT_FAILURE (rc)) {
1864	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1865	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1866	} else {
1867	ok = 1;
1868	}
1869	}
1870	if (ok) {
1871	#else
1872	if (cur_drv->bs == NULL \|\|
1873	bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
1874	FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
1875	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK, 0x00, 0x00);
1876	} else {
1877	#endif
1878	if (cur_drv->sect == cur_drv->last_sect) {
1879	fdctrl->data_state &= ~FD_STATE_FORMAT;
1880	/* Last sector done */
1881	if (FD_DID_SEEK(fdctrl->data_state))
1882	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
1883	else
1884	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
1885	} else {
1886	/* More to do */
1887	fdctrl->data_pos = 0;
1888	fdctrl->data_len = 4;
1889	}
1890	}
1891	}
1892
1893	static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
1894	{
1895	RT_NOREF(direction);
1896	fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
1897	fdctrl->fifo[0] = fdctrl->lock << 4;
1898	fdctrl_set_fifo(fdctrl, 1, 0);
1899	}
1900
1901	static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
1902	{
1903	RT_NOREF(direction);
1904	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1905
1906	/* Drives position */
1907	fdctrl->fifo[0] = drv0(fdctrl)->track;
1908	fdctrl->fifo[1] = drv1(fdctrl)->track;
1909	#if MAX_FD == 4
1910	fdctrl->fifo[2] = drv2(fdctrl)->track;
1911	fdctrl->fifo[3] = drv3(fdctrl)->track;
1912	#else
1913	fdctrl->fifo[2] = 0;
1914	fdctrl->fifo[3] = 0;
1915	#endif
1916	/* timers */
1917	fdctrl->fifo[4] = fdctrl->timer0;
1918	fdctrl->fifo[5] = (fdctrl->timer1 << 1) \| (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
1919	fdctrl->fifo[6] = cur_drv->last_sect;
1920	fdctrl->fifo[7] = (fdctrl->lock << 7) \|
1921	(cur_drv->perpendicular << 2);
1922	fdctrl->fifo[8] = fdctrl->config;
1923	fdctrl->fifo[9] = fdctrl->precomp_trk;
1924	fdctrl_set_fifo(fdctrl, 10, 0);
1925	}
1926
1927	static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
1928	{
1929	RT_NOREF(direction);
1930	/* Controller's version */
1931	fdctrl->fifo[0] = fdctrl->version;
1932	fdctrl_set_fifo(fdctrl, 1, 0);
1933	}
1934
1935	static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
1936	{
1937	RT_NOREF(direction);
1938	fdctrl->fifo[0] = 0x01; /* Stepping 1 */
1939	fdctrl_set_fifo(fdctrl, 1, 0);
1940	}
1941
1942	static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
1943	{
1944	RT_NOREF(direction);
1945	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1946
1947	/* Drives position */
1948	drv0(fdctrl)->track = fdctrl->fifo[3];
1949	drv1(fdctrl)->track = fdctrl->fifo[4];
1950	#if MAX_FD == 4
1951	drv2(fdctrl)->track = fdctrl->fifo[5];
1952	drv3(fdctrl)->track = fdctrl->fifo[6];
1953	#endif
1954	/* timers */
1955	fdctrl->timer0 = fdctrl->fifo[7];
1956	fdctrl->timer1 = fdctrl->fifo[8];
1957	cur_drv->last_sect = fdctrl->fifo[9];
1958	fdctrl->lock = fdctrl->fifo[10] >> 7;
1959	cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
1960	fdctrl->config = fdctrl->fifo[11];
1961	fdctrl->precomp_trk = fdctrl->fifo[12];
1962	fdctrl->pwrd = fdctrl->fifo[13];
1963	fdctrl_reset_fifo(fdctrl);
1964	}
1965
1966	static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
1967	{
1968	RT_NOREF(direction);
1969	fdrive_t *cur_drv = get_cur_drv(fdctrl);
1970
1971	fdctrl->fifo[0] = 0;
1972	fdctrl->fifo[1] = 0;
1973	/* Drives position */
1974	fdctrl->fifo[2] = drv0(fdctrl)->track;
1975	fdctrl->fifo[3] = drv1(fdctrl)->track;
1976	#if MAX_FD == 4
1977	fdctrl->fifo[4] = drv2(fdctrl)->track;
1978	fdctrl->fifo[5] = drv3(fdctrl)->track;
1979	#else
1980	fdctrl->fifo[4] = 0;
1981	fdctrl->fifo[5] = 0;
1982	#endif
1983	/* timers */
1984	fdctrl->fifo[6] = fdctrl->timer0;
1985	fdctrl->fifo[7] = fdctrl->timer1;
1986	fdctrl->fifo[8] = cur_drv->last_sect;
1987	fdctrl->fifo[9] = (fdctrl->lock << 7) \|
1988	(cur_drv->perpendicular << 2);
1989	fdctrl->fifo[10] = fdctrl->config;
1990	fdctrl->fifo[11] = fdctrl->precomp_trk;
1991	fdctrl->fifo[12] = fdctrl->pwrd;
1992	fdctrl->fifo[13] = 0;
1993	fdctrl->fifo[14] = 0;
1994	fdctrl_set_fifo(fdctrl, 15, 0);
1995	}
1996
1997	static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
1998	{
1999	RT_NOREF(direction);
2000	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2001
2002	FLOPPY_DPRINTF("CMD:%02x SEL:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
2003
2004	fdctrl->msr &= ~FD_MSR_RQM;
2005	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2006	#ifdef VBOX
2007	TMTimerSetMillies(fdctrl->result_timer, 1000 / 50);
2008	#else
2009	qemu_mod_timer(fdctrl->result_timer,
2010	qemu_get_clock(vm_clock) + (get_ticks_per_sec() / 50));
2011	#endif
2012	}
2013
2014	static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
2015	{
2016	RT_NOREF(direction);
2017	fdrive_t *cur_drv;
2018	uint8_t ns, dp;
2019
2020	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2021	cur_drv = get_cur_drv(fdctrl);
2022	fdctrl->data_state &= ~(FD_STATE_MULTI \| FD_STATE_SEEK);
2023	ns = fdctrl->fifo[3];
2024	dp = fdctrl->fifo[5];
2025
2026	FLOPPY_DPRINTF("Format track %d at %d, %d sectors, filler %02x\n",
2027	cur_drv->track, GET_CUR_DRV(fdctrl), ns, dp);
2028	FLOPPY_DPRINTF("CMD:%02x SEL:%02x N:%02x SC:%02x GPL:%02x D:%02x\n",
2029	fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
2030	fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5]);
2031
2032	/* Since we cannot actually format anything, we have to make sure that
2033	* whatever new format the guest is trying to establish matches the
2034	* existing format of the medium.
2035	*/
2036	if (cur_drv->last_sect != ns \|\| fdctrl->fifo[2] != 2)
2037	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_NW, 0);
2038	else
2039	{
2040	cur_drv->bps = fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
2041	cur_drv->last_sect = ns;
2042
2043	fdctrl_start_format(fdctrl);
2044	}
2045	}
2046
2047	static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
2048	{
2049	RT_NOREF(direction);
2050	fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
2051	fdctrl->timer1 = fdctrl->fifo[2] >> 1;
2052	if (fdctrl->fifo[2] & 1)
2053	fdctrl->dor &= ~FD_DOR_DMAEN;
2054	else
2055	fdctrl->dor \|= FD_DOR_DMAEN;
2056	/* No result back */
2057	fdctrl_reset_fifo(fdctrl);
2058	}
2059
2060	static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
2061	{
2062	RT_NOREF(direction);
2063	fdrive_t *cur_drv;
2064
2065	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2066	cur_drv = get_cur_drv(fdctrl);
2067	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2068	/* 1 Byte status back */
2069	fdctrl->fifo[0] = (cur_drv->ro << 6) \|
2070	(cur_drv->track == 0 ? 0x10 : 0x00) \|
2071	(cur_drv->head << 2) \|
2072	GET_CUR_DRV(fdctrl) \|
2073	0x28;
2074	fdctrl_set_fifo(fdctrl, 1, 0);
2075	}
2076
2077	static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
2078	{
2079	RT_NOREF(direction);
2080	fdrive_t *cur_drv;
2081	uint8_t st0;
2082
2083	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2084	cur_drv = get_cur_drv(fdctrl);
2085	fd_recalibrate(cur_drv);
2086	fdctrl_reset_fifo(fdctrl);
2087	st0 = FD_SR0_SEEK \| GET_CUR_DRV(fdctrl);
2088	/* No drive means no TRK0 signal. */
2089	if (cur_drv->drive == FDRIVE_DRV_NONE)
2090	st0 \|= FD_SR0_ABNTERM \| FD_SR0_EQPMT;
2091	/* Raise Interrupt */
2092	fdctrl_raise_irq(fdctrl, st0);
2093	}
2094
2095	static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
2096	{
2097	RT_NOREF(direction);
2098	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2099
2100	FLOPPY_DPRINTF("CMD:%02x\n", fdctrl->fifo[0]);
2101	if(fdctrl->reset_sensei > 0) {
2102	fdctrl->fifo[0] =
2103	FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
2104	fdctrl->reset_sensei--;
2105	} else {
2106	/* XXX: status0 handling is broken for read/write
2107	commands, so we do this hack. It should be suppressed
2108	ASAP */
2109	fdctrl->fifo[0] =
2110	FD_SR0_SEEK \| (cur_drv->head << 2) \| GET_CUR_DRV(fdctrl);
2111	/* Hack to preserve SR0 on equipment check failures (no drive). */
2112	if (fdctrl->status0 & FD_SR0_EQPMT)
2113	fdctrl->fifo[0] = fdctrl->status0;
2114	}
2115
2116	fdctrl->fifo[1] = cur_drv->track;
2117	fdctrl_set_fifo(fdctrl, 2, 0);
2118	FLOPPY_DPRINTF("ST0:%02x PCN:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
2119	fdctrl->status0 = FD_SR0_RDYCHG;
2120	}
2121
2122	static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
2123	{
2124	RT_NOREF(direction);
2125	fdrive_t *cur_drv;
2126
2127	FLOPPY_DPRINTF("CMD:%02x SEL:%02x NCN:%02x\n", fdctrl->fifo[0],
2128	fdctrl->fifo[1], fdctrl->fifo[2]);
2129
2130	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2131	cur_drv = get_cur_drv(fdctrl);
2132	fdctrl_reset_fifo(fdctrl);
2133	#ifdef VBOX
2134	/* The seek command just sends step pulses to the drive and doesn't care if
2135	* there's a medium inserted or if it's banging the head against the drive.
2136	*/
2137	cur_drv->track = fdctrl->fifo[2];
2138	cur_drv->ltrk = cur_drv->track;
2139	cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
2140	/* Raise Interrupt */
2141	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK \| GET_CUR_DRV(fdctrl));
2142	#else
2143	if (fdctrl->fifo[2] > cur_drv->max_track) {
2144	fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM \| FD_SR0_SEEK);
2145	} else {
2146	cur_drv->track = fdctrl->fifo[2];
2147	/* Raise Interrupt */
2148	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2149	}
2150	#endif
2151	}
2152
2153	static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
2154	{
2155	RT_NOREF(direction);
2156	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2157
2158	if (fdctrl->fifo[1] & 0x80)
2159	cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
2160	/* No result back */
2161	fdctrl_reset_fifo(fdctrl);
2162	}
2163
2164	static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
2165	{
2166	RT_NOREF(direction);
2167	fdctrl->config = fdctrl->fifo[2];
2168	fdctrl->precomp_trk = fdctrl->fifo[3];
2169	/* No result back */
2170	fdctrl_reset_fifo(fdctrl);
2171	}
2172
2173	static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
2174	{
2175	RT_NOREF(direction);
2176	fdctrl->pwrd = fdctrl->fifo[1];
2177	fdctrl->fifo[0] = fdctrl->fifo[1];
2178	fdctrl_set_fifo(fdctrl, 1, 0);
2179	}
2180
2181	static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
2182	{
2183	RT_NOREF(direction);
2184	/* No result back */
2185	fdctrl_reset_fifo(fdctrl);
2186	}
2187
2188	static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
2189	{
2190	RT_NOREF(direction);
2191	/* fdrive_t cur_drv = get_cur_drv(fdctrl); - unused /
2192
2193	/* This command takes a variable number of parameters. It can be terminated
2194	* at any time if the high bit of a parameter is set. Once there are 6 bytes
2195	* in the FIFO (command + 5 parameter bytes), data_len/data_pos will be 7.
2196	*/
2197	if (fdctrl->data_len == 7 \|\| (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80)) {
2198
2199	/* Command parameters done */
2200	if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
2201	/* Data is echoed, but not stored! */
2202	fdctrl->fifo[0] = fdctrl->data_len > 2 ? fdctrl->fifo[1] : 0;
2203	fdctrl->fifo[1] = fdctrl->data_len > 3 ? fdctrl->fifo[2] : 0;
2204	fdctrl->fifo[2] = 0;
2205	fdctrl->fifo[3] = 0;
2206	fdctrl_set_fifo(fdctrl, 4, 0);
2207	} else {
2208	fdctrl_reset_fifo(fdctrl);
2209	}
2210	} else
2211	fdctrl->data_len++; /* Wait for another byte. */
2212	}
2213
2214	static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
2215	{
2216	RT_NOREF(direction);
2217	fdrive_t *cur_drv;
2218
2219	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2220	cur_drv = get_cur_drv(fdctrl);
2221	if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
2222	cur_drv->track = cur_drv->max_track - 1;
2223	} else {
2224	cur_drv->track += fdctrl->fifo[2];
2225	}
2226	fdctrl_reset_fifo(fdctrl);
2227	/* Raise Interrupt */
2228	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2229	}
2230
2231	static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
2232	{
2233	RT_NOREF(direction);
2234	fdrive_t *cur_drv;
2235
2236	SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
2237	cur_drv = get_cur_drv(fdctrl);
2238	if (fdctrl->fifo[2] > cur_drv->track) {
2239	cur_drv->track = 0;
2240	} else {
2241	cur_drv->track -= fdctrl->fifo[2];
2242	}
2243	fdctrl_reset_fifo(fdctrl);
2244	/* Raise Interrupt */
2245	fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
2246	}
2247
2248	static const struct {
2249	uint8_t value;
2250	uint8_t mask;
2251	const char* name;
2252	int parameters;
2253	void (handler)(fdctrl_t fdctrl, int direction);
2254	int direction;
2255	} handlers[] = {
2256	{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
2257	{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
2258	{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
2259	{ FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
2260	{ FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
2261	{ FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
2262	{ FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
2263	{ FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
2264	{ FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
2265	{ FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
2266	{ FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
2267	{ FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
2268	{ FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
2269	{ FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
2270	{ FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
2271	{ FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
2272	{ FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
2273	{ FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
2274	{ FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
2275	{ FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
2276	{ FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
2277	{ FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
2278	{ FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 1, fdctrl_handle_drive_specification_command },
2279	{ FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
2280	{ FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
2281	{ FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
2282	{ FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
2283	{ FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
2284	{ FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
2285	{ FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
2286	{ FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
2287	{ 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
2288	};
2289	/* Associate command to an index in the 'handlers' array */
2290	static uint8_t command_to_handler[256];
2291
2292	static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
2293	{
2294	fdrive_t *cur_drv;
2295	int pos;
2296
2297	cur_drv = get_cur_drv(fdctrl);
2298	/* Reset mode */
2299	if (!(fdctrl->dor & FD_DOR_nRESET)) {
2300	FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
2301	return;
2302	}
2303	if (!(fdctrl->msr & FD_MSR_RQM) \|\| (fdctrl->msr & FD_MSR_DIO)) {
2304	FLOPPY_ERROR("controller not ready for writing\n");
2305	return;
2306	}
2307	fdctrl->dsr &= ~FD_DSR_PWRDOWN;
2308	/* Is it write command time ? */
2309	if (fdctrl->msr & FD_MSR_NONDMA) {
2310	/* FIFO data write */
2311	pos = fdctrl->data_pos++;
2312	pos %= FD_SECTOR_LEN;
2313	fdctrl->fifo[pos] = value;
2314	if (pos == FD_SECTOR_LEN - 1 \|\|
2315	fdctrl->data_pos == fdctrl->data_len) {
2316	#ifdef VBOX
2317	blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
2318	#else
2319	bdrv_write(cur_drv->bs, fd_sector(cur_drv),
2320	fdctrl->fifo, 1);
2321	#endif
2322	}
2323	/* Switch from transfer mode to status mode
2324	* then from status mode to command mode
2325	*/
2326	if (fdctrl->data_pos == fdctrl->data_len)
2327	fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
2328	return;
2329	}
2330	if (fdctrl->data_pos == 0) {
2331	/* Command */
2332	fdctrl_reset_irq(fdctrl); /* If pending from previous seek/recalibrate. */
2333	pos = command_to_handler[value & 0xff];
2334	FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
2335	fdctrl->data_len = handlers[pos].parameters + 1;
2336	fdctrl->msr \|= FD_MSR_CMDBUSY;
2337	}
2338
2339	FLOPPY_DPRINTF("%s: %02x\n", __FUNCTION__, value);
2340	fdctrl->fifo[fdctrl->data_pos++ % FD_SECTOR_LEN] = value;
2341	if (fdctrl->data_pos == fdctrl->data_len) {
2342	/* We now have all parameters
2343	* and will be able to treat the command
2344	*/
2345	if (fdctrl->data_state & FD_STATE_FORMAT) {
2346	fdctrl_format_sector(fdctrl);
2347	return;
2348	}
2349
2350	pos = command_to_handler[fdctrl->fifo[0] & 0xff];
2351	FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
2352	(*handlers[pos].handler)(fdctrl, handlers[pos].direction);
2353	}
2354	}
2355
2356	static void fdctrl_result_timer(void *opaque)
2357	{
2358	fdctrl_t fdctrl = (fdctrl_t )opaque;
2359	fdrive_t *cur_drv = get_cur_drv(fdctrl);
2360
2361	/* Pretend we are spinning.
2362	* This is needed for Coherent, which uses READ ID to check for
2363	* sector interleaving.
2364	*/
2365	if (cur_drv->last_sect != 0) {
2366	cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
2367	}
2368	/* READ_ID can't automatically succeed! */
2369	#ifdef VBOX
2370	if (!cur_drv->max_track) {
2371	FLOPPY_DPRINTF("read id when no disk in drive\n");
2372	/// @todo This is wrong! Command should not complete.
2373	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2374	} else if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
2375	FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
2376	fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
2377	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2378	} else if (cur_drv->track >= cur_drv->max_track) {
2379	FLOPPY_DPRINTF("read id past last track (%d >= %d)\n",
2380	cur_drv->track, cur_drv->max_track);
2381	cur_drv->ltrk = 0;
2382	fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA \| FD_SR1_ND, FD_SR2_MD);
2383	}
2384	else
2385	#endif
2386	fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
2387	}
2388
2389
2390	#ifdef VBOX
2391
2392	/* -=-=-=-=-=-=-=-=- Timer Callback -=-=-=-=-=-=-=-=- */
2393
2394	/**
2395	* @callback_method_impl{FNTMTIMERDEV}
2396	*/
2397	static DECLCALLBACK(void) fdcTimerCallback(PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser)
2398	{
2399	RT_NOREF(pDevIns, pTimer);
2400	fdctrl_t fdctrl = (fdctrl_t )pvUser;
2401	fdctrl_result_timer(fdctrl);
2402	}
2403
2404
2405	/* -=-=-=-=-=-=-=-=- I/O Port Access Handlers -=-=-=-=-=-=-=-=- */
2406
2407	/**
2408	* @callback_method_impl{FNIOMIOPORTOUT}
2409	*/
2410	static DECLCALLBACK(int) fdcIoPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT uPort, uint32_t u32, unsigned cb)
2411	{
2412	RT_NOREF(pDevIns);
2413	if (cb == 1)
2414	fdctrl_write (pvUser, uPort & 7, u32);
2415	else
2416	AssertMsgFailed(("uPort=%#x cb=%d u32=%#x\n", uPort, cb, u32));
2417	return VINF_SUCCESS;
2418	}
2419
2420
2421	/**
2422	* @callback_method_impl{FNIOMIOPORTIN}
2423	*/
2424	static DECLCALLBACK(int) fdcIoPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT uPort, uint32_t pu32, unsigned cb)
2425	{
2426	RT_NOREF(pDevIns);
2427	if (cb == 1)
2428	{
2429	*pu32 = fdctrl_read (pvUser, uPort & 7);
2430	return VINF_SUCCESS;
2431	}
2432	return VERR_IOM_IOPORT_UNUSED;
2433	}
2434
2435
2436	/* -=-=-=-=-=-=-=-=- Saved state -=-=-=-=-=-=-=-=- */
2437
2438	/**
2439	* @callback_method_impl{FNSSMDEVSAVEEXEC}
2440	*/
2441	static DECLCALLBACK(int) fdcSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
2442	{
2443	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2444	unsigned int i;
2445
2446	/* Save the FDC I/O registers... */
2447	SSMR3PutU8(pSSM, pThis->sra);
2448	SSMR3PutU8(pSSM, pThis->srb);
2449	SSMR3PutU8(pSSM, pThis->dor);
2450	SSMR3PutU8(pSSM, pThis->tdr);
2451	SSMR3PutU8(pSSM, pThis->dsr);
2452	SSMR3PutU8(pSSM, pThis->msr);
2453	/* ...the status registers... */
2454	SSMR3PutU8(pSSM, pThis->status0);
2455	SSMR3PutU8(pSSM, pThis->status1);
2456	SSMR3PutU8(pSSM, pThis->status2);
2457	/* ...the command FIFO... */
2458	SSMR3PutU32(pSSM, sizeof(pThis->fifo));
2459	SSMR3PutMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2460	SSMR3PutU32(pSSM, pThis->data_pos);
2461	SSMR3PutU32(pSSM, pThis->data_len);
2462	SSMR3PutU8(pSSM, pThis->data_state);
2463	SSMR3PutU8(pSSM, pThis->data_dir);
2464	/* ...and miscellaneous internal FDC state. */
2465	SSMR3PutU8(pSSM, pThis->reset_sensei);
2466	SSMR3PutU8(pSSM, pThis->eot);
2467	SSMR3PutU8(pSSM, pThis->timer0);
2468	SSMR3PutU8(pSSM, pThis->timer1);
2469	SSMR3PutU8(pSSM, pThis->precomp_trk);
2470	SSMR3PutU8(pSSM, pThis->config);
2471	SSMR3PutU8(pSSM, pThis->lock);
2472	SSMR3PutU8(pSSM, pThis->pwrd);
2473	SSMR3PutU8(pSSM, pThis->version);
2474
2475	/* Save the number of drives and per-drive state. Note that the media
2476	* states will be updated in fd_revalidate() and need not be saved.
2477	*/
2478	SSMR3PutU8(pSSM, pThis->num_floppies);
2479	Assert(RT_ELEMENTS(pThis->drives) == pThis->num_floppies);
2480	for (i = 0; i < pThis->num_floppies; ++i)
2481	{
2482	fdrive_t *d = &pThis->drives[i];
2483
2484	SSMR3PutMem(pSSM, &d->Led, sizeof(d->Led));
2485	SSMR3PutU32(pSSM, d->drive);
2486	SSMR3PutU8(pSSM, d->dsk_chg);
2487	SSMR3PutU8(pSSM, d->perpendicular);
2488	SSMR3PutU8(pSSM, d->head);
2489	SSMR3PutU8(pSSM, d->track);
2490	SSMR3PutU8(pSSM, d->sect);
2491	}
2492	return TMR3TimerSave (pThis->result_timer, pSSM);
2493	}
2494
2495
2496	/**
2497	* @callback_method_impl{FNSSMDEVLOADEXEC}
2498	*/
2499	static DECLCALLBACK(int) fdcLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
2500	{
2501	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2502	unsigned int i;
2503	uint32_t val32;
2504	uint8_t val8;
2505
2506	if (uVersion > FDC_SAVESTATE_CURRENT)
2507	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
2508	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
2509
2510	/* The old saved state was significantly different. However, we can get
2511	* back most of the controller state and fix the rest by pretending the
2512	* disk in the drive (if any) has been replaced. At any rate there should
2513	* be no difficulty unless the state was saved during a floppy operation.
2514	*/
2515	if (uVersion == FDC_SAVESTATE_OLD)
2516	{
2517	/* First verify a few assumptions. */
2518	AssertMsgReturn(sizeof(pThis->fifo) == FD_SECTOR_LEN,
2519	("The size of FIFO in saved state doesn't match!\n"),
2520	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2521	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == 2,
2522	("The number of drives in old saved state doesn't match!\n"),
2523	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2524	/* Now load the old state. */
2525	SSMR3GetU8(pSSM, &pThis->version);
2526	/* Toss IRQ level, DMA channel, I/O base, and state. */
2527	SSMR3GetU8(pSSM, &val8);
2528	SSMR3GetU8(pSSM, &val8);
2529	SSMR3GetU32(pSSM, &val32);
2530	SSMR3GetU8(pSSM, &val8);
2531	/* Translate dma_en. */
2532	SSMR3GetU8(pSSM, &val8);
2533	if (val8)
2534	pThis->dor \|= FD_DOR_DMAEN;
2535	SSMR3GetU8(pSSM, &pThis->cur_drv);
2536	/* Translate bootsel. */
2537	SSMR3GetU8(pSSM, &val8);
2538	pThis->tdr \|= val8 << 2;
2539	SSMR3GetMem(pSSM, &pThis->fifo, FD_SECTOR_LEN);
2540	SSMR3GetU32(pSSM, &pThis->data_pos);
2541	SSMR3GetU32(pSSM, &pThis->data_len);
2542	SSMR3GetU8(pSSM, &pThis->data_state);
2543	SSMR3GetU8(pSSM, &pThis->data_dir);
2544	SSMR3GetU8(pSSM, &pThis->status0);
2545	SSMR3GetU8(pSSM, &pThis->eot);
2546	SSMR3GetU8(pSSM, &pThis->timer0);
2547	SSMR3GetU8(pSSM, &pThis->timer1);
2548	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2549	SSMR3GetU8(pSSM, &pThis->config);
2550	SSMR3GetU8(pSSM, &pThis->lock);
2551	SSMR3GetU8(pSSM, &pThis->pwrd);
2552
2553	for (i = 0; i < 2; ++i)
2554	{
2555	fdrive_t *d = &pThis->drives[i];
2556
2557	SSMR3GetMem (pSSM, &d->Led, sizeof (d->Led));
2558	SSMR3GetU32(pSSM, &val32);
2559	d->drive = (fdrive_type_t)val32;
2560	SSMR3GetU32(pSSM, &val32); /* Toss drflags */
2561	SSMR3GetU8(pSSM, &d->perpendicular);
2562	SSMR3GetU8(pSSM, &d->head);
2563	SSMR3GetU8(pSSM, &d->track);
2564	SSMR3GetU8(pSSM, &d->sect);
2565	SSMR3GetU8(pSSM, &val8); /* Toss dir, rw */
2566	SSMR3GetU8(pSSM, &val8);
2567	SSMR3GetU32(pSSM, &val32);
2568	d->flags = (fdrive_flags_t)val32;
2569	SSMR3GetU8(pSSM, &d->last_sect);
2570	SSMR3GetU8(pSSM, &d->max_track);
2571	SSMR3GetU16(pSSM, &d->bps);
2572	SSMR3GetU8(pSSM, &d->ro);
2573	}
2574	}
2575	else /* New state - straightforward. */
2576	{
2577	Assert(uVersion == FDC_SAVESTATE_CURRENT);
2578	/* Load the FDC I/O registers... */
2579	SSMR3GetU8(pSSM, &pThis->sra);
2580	SSMR3GetU8(pSSM, &pThis->srb);
2581	SSMR3GetU8(pSSM, &pThis->dor);
2582	SSMR3GetU8(pSSM, &pThis->tdr);
2583	SSMR3GetU8(pSSM, &pThis->dsr);
2584	SSMR3GetU8(pSSM, &pThis->msr);
2585	/* ...the status registers... */
2586	SSMR3GetU8(pSSM, &pThis->status0);
2587	SSMR3GetU8(pSSM, &pThis->status1);
2588	SSMR3GetU8(pSSM, &pThis->status2);
2589	/* ...the command FIFO, if the size matches... */
2590	SSMR3GetU32(pSSM, &val32);
2591	AssertMsgReturn(sizeof(pThis->fifo) == val32,
2592	("The size of FIFO in saved state doesn't match!\n"),
2593	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2594	SSMR3GetMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
2595	SSMR3GetU32(pSSM, &pThis->data_pos);
2596	SSMR3GetU32(pSSM, &pThis->data_len);
2597	SSMR3GetU8(pSSM, &pThis->data_state);
2598	SSMR3GetU8(pSSM, &pThis->data_dir);
2599	/* ...and miscellaneous internal FDC state. */
2600	SSMR3GetU8(pSSM, &pThis->reset_sensei);
2601	SSMR3GetU8(pSSM, &pThis->eot);
2602	SSMR3GetU8(pSSM, &pThis->timer0);
2603	SSMR3GetU8(pSSM, &pThis->timer1);
2604	SSMR3GetU8(pSSM, &pThis->precomp_trk);
2605	SSMR3GetU8(pSSM, &pThis->config);
2606	SSMR3GetU8(pSSM, &pThis->lock);
2607	SSMR3GetU8(pSSM, &pThis->pwrd);
2608	SSMR3GetU8(pSSM, &pThis->version);
2609
2610	/* Validate the number of drives. */
2611	SSMR3GetU8(pSSM, &pThis->num_floppies);
2612	AssertMsgReturn(RT_ELEMENTS(pThis->drives) == pThis->num_floppies,
2613	("The number of drives in saved state doesn't match!\n"),
2614	VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
2615
2616	/* Load the per-drive state. */
2617	for (i = 0; i < pThis->num_floppies; ++i)
2618	{
2619	fdrive_t *d = &pThis->drives[i];
2620
2621	SSMR3GetMem(pSSM, &d->Led, sizeof(d->Led));
2622	SSMR3GetU32(pSSM, &val32);
2623	d->drive = (fdrive_type_t)val32;
2624	SSMR3GetU8(pSSM, &d->dsk_chg);
2625	SSMR3GetU8(pSSM, &d->perpendicular);
2626	SSMR3GetU8(pSSM, &d->head);
2627	SSMR3GetU8(pSSM, &d->track);
2628	SSMR3GetU8(pSSM, &d->sect);
2629	}
2630	}
2631	return TMR3TimerLoad (pThis->result_timer, pSSM);
2632	}
2633
2634
2635	/* -=-=-=-=-=-=-=-=- Drive level interfaces -=-=-=-=-=-=-=-=- */
2636
2637	/**
2638	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnMountNotify}
2639	*/
2640	static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
2641	{
2642	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2643	LogFlow(("fdMountNotify:\n"));
2644	fd_revalidate(pDrv);
2645	}
2646
2647
2648	/**
2649	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnUnmountNotify}
2650	*/
2651	static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
2652	{
2653	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
2654	LogFlow(("fdUnmountNotify:\n"));
2655	fd_revalidate(pDrv);
2656	}
2657
2658
2659	/**
2660	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2661	*/
2662	static DECLCALLBACK(void ) fdQueryInterface (PPDMIBASE pInterface, const char pszIID)
2663	{
2664	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IBase);
2665
2666	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrv->IBase);
2667	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pDrv->IPort);
2668	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrv->IMountNotify);
2669	return NULL;
2670	}
2671
2672
2673	/**
2674	* @interface_method_impl{PDMIMEDIAPORT,pfnQueryDeviceLocation}
2675	*/
2676	static DECLCALLBACK(int) fdQueryDeviceLocation(PPDMIMEDIAPORT pInterface, const char **ppcszController,
2677	uint32_t piInstance, uint32_t piLUN)
2678	{
2679	fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IPort);
2680	PPDMDEVINS pDevIns = pDrv->pDevIns;
2681
2682	AssertPtrReturn(ppcszController, VERR_INVALID_POINTER);
2683	AssertPtrReturn(piInstance, VERR_INVALID_POINTER);
2684	AssertPtrReturn(piLUN, VERR_INVALID_POINTER);
2685
2686	*ppcszController = pDevIns->pReg->szName;
2687	*piInstance = pDevIns->iInstance;
2688	*piLUN = pDrv->iLUN;
2689
2690	return VINF_SUCCESS;
2691	}
2692
2693	/* -=-=-=-=-=-=-=-=- Controller level interfaces -=-=-=-=-=-=-=-=- */
2694
2695	/**
2696	* @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed}
2697	*/
2698	static DECLCALLBACK(int) fdcStatusQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
2699	{
2700	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, ILeds);
2701	if (iLUN < RT_ELEMENTS(pThis->drives)) {
2702	*ppLed = &pThis->drives[iLUN].Led;
2703	Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
2704	return VINF_SUCCESS;
2705	}
2706	return VERR_PDM_LUN_NOT_FOUND;
2707	}
2708
2709
2710	/**
2711	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2712	*/
2713	static DECLCALLBACK(void ) fdcStatusQueryInterface(PPDMIBASE pInterface, const char pszIID)
2714	{
2715	fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
2716
2717	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
2718	PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
2719	return NULL;
2720	}
2721
2722
2723	/**
2724	* Configure a drive.
2725	*
2726	* @returns VBox status code.
2727	* @param drv The drive in question.
2728	* @param pDevIns The driver instance.
2729	* @param fInit Set if we're at init time and can change the drive type.
2730	*/
2731	static int fdConfig(fdrive_t *drv, PPDMDEVINS pDevIns, bool fInit)
2732	{
2733	static const char * const s_apszDesc[] = {"Floppy Drive A:", "Floppy Drive B"};
2734	int rc;
2735
2736	/*
2737	* Reset the LED just to be on the safe side.
2738	*/
2739	Assert (RT_ELEMENTS(s_apszDesc) > drv->iLUN);
2740	Assert (drv->Led.u32Magic == PDMLED_MAGIC);
2741	drv->Led.Actual.u32 = 0;
2742	drv->Led.Asserted.u32 = 0;
2743
2744	/*
2745	* Try attach the block device and get the interfaces.
2746	*/
2747	rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, s_apszDesc[drv->iLUN]);
2748	if (RT_SUCCESS (rc)) {
2749	drv->pDrvMedia = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMEDIA);
2750	if (drv->pDrvMedia) {
2751	drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
2752	if (drv->pDrvMount) {
2753	fd_init(drv, fInit);
2754	} else {
2755	AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
2756	rc = VERR_PDM_MISSING_INTERFACE;
2757	}
2758
2759	} else {
2760	AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
2761	rc = VERR_PDM_MISSING_INTERFACE;
2762	}
2763	} else {
2764	AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
2765	("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
2766	switch (rc) {
2767	case VERR_ACCESS_DENIED:
2768	/* Error already cached by DrvHostBase */
2769	break;
2770	case VERR_PDM_NO_ATTACHED_DRIVER:
2771	/* Legal on architectures without a floppy controller */
2772	break;
2773	default:
2774	rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
2775	N_ ("The floppy controller cannot attach to the floppy drive"));
2776	break;
2777	}
2778	}
2779
2780	if (RT_FAILURE (rc)) {
2781	drv->pDrvBase = NULL;
2782	drv->pDrvMedia = NULL;
2783	drv->pDrvMount = NULL;
2784	}
2785	LogFlow (("fdConfig: returns %Rrc\n", rc));
2786	return rc;
2787	}
2788
2789
2790	/**
2791	* @interface_method_impl{PDMDEVREG,pfnAttach}
2792	*
2793	* This is called when we change block driver for a floppy drive.
2794	*/
2795	static DECLCALLBACK(int) fdcAttach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2796	{
2797	fdctrl_t fdctrl = PDMINS_2_DATA(pDevIns, fdctrl_t );
2798	fdrive_t *drv;
2799	int rc;
2800	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2801
2802	AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
2803	("The FDC device does not support hotplugging\n"),
2804	VERR_INVALID_PARAMETER);
2805
2806	/*
2807	* Validate.
2808	*/
2809	if (iLUN >= 2) {
2810	AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
2811	iLUN));
2812	return VERR_PDM_DEVINS_NO_ATTACH;
2813	}
2814
2815	/*
2816	* Locate the drive and stuff.
2817	*/
2818	drv = &fdctrl->drives[iLUN];
2819
2820	/* the usual paranoia */
2821	AssertRelease (!drv->pDrvBase);
2822	AssertRelease (!drv->pDrvMedia);
2823	AssertRelease (!drv->pDrvMount);
2824
2825	rc = fdConfig (drv, pDevIns, false /fInit/);
2826	AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
2827	("Configuration error: failed to configure drive %d, rc=%Rrc\n", iLUN, rc));
2828	if (RT_SUCCESS(rc)) {
2829	fd_revalidate (drv);
2830	}
2831
2832	LogFlow (("floppyAttach: returns %Rrc\n", rc));
2833	return rc;
2834	}
2835
2836
2837	/**
2838	* @interface_method_impl{PDMDEVREG,pfnDetach}
2839	*
2840	* The floppy drive has been temporarily 'unplugged'.
2841	*/
2842	static DECLCALLBACK(void) fdcDetach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
2843	{
2844	RT_NOREF(fFlags);
2845	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2846	LogFlow (("ideDetach: iLUN=%u\n", iLUN));
2847
2848	switch (iLUN)
2849	{
2850	case 0:
2851	case 1:
2852	{
2853	fdrive_t *drv = &pThis->drives[iLUN];
2854	drv->pDrvBase = NULL;
2855	drv->pDrvMedia = NULL;
2856	drv->pDrvMount = NULL;
2857	break;
2858	}
2859
2860	default:
2861	AssertMsgFailed(("Cannot detach LUN#%d!\n", iLUN));
2862	break;
2863	}
2864	}
2865
2866
2867	/**
2868	* @interface_method_impl{PDMDEVREG,pfnReset}
2869	*
2870	* I haven't check the specs on what's supposed to happen on reset, but we
2871	* should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
2872	* at wrong time like we do if this was all void.
2873	*/
2874	static DECLCALLBACK(void) fdcReset(PPDMDEVINS pDevIns)
2875	{
2876	fdctrl_t pThis = PDMINS_2_DATA (pDevIns, fdctrl_t );
2877	unsigned i;
2878	LogFlow (("fdcReset:\n"));
2879
2880	fdctrl_reset(pThis, 0);
2881
2882	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
2883	fd_revalidate(&pThis->drives[i]);
2884	}
2885
2886
2887	/**
2888	* @interface_method_impl{PDMDEVREG,pfnConstruct}
2889	*/
2890	static DECLCALLBACK(int) fdcConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
2891	{
2892	RT_NOREF(iInstance);
2893	fdctrl_t pThis = PDMINS_2_DATA(pDevIns, fdctrl_t );
2894	int rc;
2895	unsigned i, j;
2896	int ii;
2897	bool mem_mapped;
2898	uint16_t io_base;
2899	uint8_t irq_lvl, dma_chann;
2900	PPDMIBASE pBase;
2901
2902	Assert(iInstance == 0);
2903	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
2904
2905	/*
2906	* Validate configuration.
2907	*/
2908	if (!CFGMR3AreValuesValid(pCfg, "IRQ\0DMA\0MemMapped\0IOBase\0"))
2909	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
2910
2911	/*
2912	* Read the configuration.
2913	*/
2914	rc = CFGMR3QueryU8Def(pCfg, "IRQ", &irq_lvl, 6);
2915	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc), rc);
2916
2917	rc = CFGMR3QueryU8Def(pCfg, "DMA", &dma_chann, 2);
2918	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc), rc);
2919
2920	rc = CFGMR3QueryU16Def(pCfg, "IOBase", &io_base, 0x3f0);
2921	AssertMsgRCReturn(rc, ("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc), rc);
2922
2923	rc = CFGMR3QueryBoolDef(pCfg, "MemMapped", &mem_mapped, false);
2924	AssertMsgRCReturn(rc, ("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc), rc);
2925
2926	/*
2927	* Initialize data.
2928	*/
2929	LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", irq_lvl, dma_chann, io_base));
2930	pThis->pDevIns = pDevIns;
2931	pThis->version = 0x90; /* Intel 82078 controller */
2932	pThis->irq_lvl = irq_lvl;
2933	pThis->dma_chann = dma_chann;
2934	pThis->io_base = io_base;
2935	pThis->config = FD_CONFIG_EIS \| FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
2936	pThis->num_floppies = MAX_FD;
2937
2938	/* Fill 'command_to_handler' lookup table */
2939	for (ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--)
2940	for (j = 0; j < sizeof(command_to_handler); j++)
2941	if ((j & handlers[ii].mask) == handlers[ii].value)
2942	command_to_handler[j] = ii;
2943
2944	pThis->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
2945	pThis->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
2946
2947	for (i = 0; i < RT_ELEMENTS(pThis->drives); ++i)
2948	{
2949	fdrive_t *pDrv = &pThis->drives[i];
2950
2951	pDrv->drive = FDRIVE_DRV_NONE;
2952	pDrv->iLUN = i;
2953	pDrv->pDevIns = pDevIns;
2954
2955	pDrv->IBase.pfnQueryInterface = fdQueryInterface;
2956	pDrv->IMountNotify.pfnMountNotify = fdMountNotify;
2957	pDrv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
2958	pDrv->IPort.pfnQueryDeviceLocation = fdQueryDeviceLocation;
2959	pDrv->Led.u32Magic = PDMLED_MAGIC;
2960	}
2961
2962	/*
2963	* Create the FDC timer.
2964	*/
2965	rc = PDMDevHlpTMTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdcTimerCallback, pThis,
2966	TMTIMER_FLAGS_DEFAULT_CRIT_SECT, "FDC Timer", &pThis->result_timer);
2967	if (RT_FAILURE(rc))
2968	return rc;
2969
2970	/*
2971	* Register DMA channel.
2972	*/
2973	if (pThis->dma_chann != 0xff)
2974	{
2975	rc = PDMDevHlpDMARegister(pDevIns, dma_chann, &fdctrl_transfer_handler, pThis);
2976	if (RT_FAILURE(rc))
2977	return rc;
2978	}
2979
2980	/*
2981	* IO / MMIO.
2982	*/
2983	if (mem_mapped)
2984	{
2985	AssertMsgFailed(("Memory mapped floppy not support by now\n"));
2986	return VERR_NOT_SUPPORTED;
2987	#if 0
2988	FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
2989	io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
2990	cpu_register_physical_memory(base, 0x08, io_mem);
2991	#endif
2992	}
2993	else
2994	{
2995	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x1, 5, pThis,
2996	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#1");
2997	if (RT_FAILURE(rc))
2998	return rc;
2999
3000	rc = PDMDevHlpIOPortRegister(pDevIns, io_base + 0x7, 1, pThis,
3001	fdcIoPortWrite, fdcIoPortRead, NULL, NULL, "FDC#2");
3002	if (RT_FAILURE(rc))
3003	return rc;
3004	}
3005
3006	/*
3007	* Register the saved state data unit.
3008	*/
3009	rc = PDMDevHlpSSMRegister(pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*pThis), fdcSaveExec, fdcLoadExec);
3010	if (RT_FAILURE(rc))
3011	return rc;
3012
3013	/*
3014	* Attach the status port (optional).
3015	*/
3016	rc = PDMDevHlpDriverAttach(pDevIns, PDM_STATUS_LUN, &pThis->IBaseStatus, &pBase, "Status Port");
3017	if (RT_SUCCESS (rc))
3018	pThis->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
3019	else if (rc != VERR_PDM_NO_ATTACHED_DRIVER)
3020	{
3021	AssertMsgFailed(("Failed to attach to status driver. rc=%Rrc\n", rc));
3022	return rc;
3023	}
3024
3025	/*
3026	* Initialize drives.
3027	*/
3028	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3029	{
3030	fdrive_t *pDrv = &pThis->drives[i];
3031	rc = fdConfig(pDrv, pDevIns, true /fInit/);
3032	if ( RT_FAILURE(rc)
3033	&& rc != VERR_PDM_NO_ATTACHED_DRIVER)
3034	{
3035	AssertMsgFailed(("Configuration error: failed to configure drive %d, rc=%Rrc\n", i, rc));
3036	return rc;
3037	}
3038	}
3039
3040	fdctrl_reset(pThis, 0);
3041
3042	for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
3043	fd_revalidate(&pThis->drives[i]);
3044
3045	return VINF_SUCCESS;
3046	}
3047
3048
3049	/**
3050	* The device registration structure.
3051	*/
3052	const PDMDEVREG g_DeviceFloppyController =
3053	{
3054	/* u32Version */
3055	PDM_DEVREG_VERSION,
3056	/* szName */
3057	"i82078",
3058	/* szRCMod */
3059	"",
3060	/* szR0Mod */
3061	"",
3062	/* pszDescription */
3063	"Floppy drive controller (Intel 82078)",
3064	/* fFlags */
3065	PDM_DEVREG_FLAGS_DEFAULT_BITS,
3066	/* fClass */
3067	PDM_DEVREG_CLASS_STORAGE,
3068	/* cMaxInstances */
3069	1,
3070	/* cbInstance */
3071	sizeof(fdctrl_t),
3072	/* pfnConstruct */
3073	fdcConstruct,
3074	/* pfnDestruct */
3075	NULL,
3076	/* pfnRelocate */
3077	NULL,
3078	/* pfnMemSetup */
3079	NULL,
3080	/* pfnPowerOn */
3081	NULL,
3082	/* pfnReset */
3083	fdcReset,
3084	/* pfnSuspend */
3085	NULL,
3086	/* pfnResume */
3087	NULL,
3088	/* pfnAttach */
3089	fdcAttach,
3090	/* pfnDetach */
3091	fdcDetach,
3092	/* pfnQueryInterface. */
3093	NULL,
3094	/* pfnInitComplete */
3095	NULL,
3096	/* pfnPowerOff */
3097	NULL,
3098	/* pfnSoftReset */
3099	NULL,
3100	/* u32VersionEnd */
3101	PDM_DEVREG_VERSION
3102	};
3103
3104	#endif /* VBOX */
3105
3106	/*
3107	* Local Variables:
3108	* mode: c
3109	* c-file-style: "k&r"
3110	* indent-tabs-mode: nil
3111	* End:
3112	*/
3113

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source: vbox/trunk/src/VBox/Devices/Storage/DevFdc.cpp@ 65620

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